diff --git a/google/cloud/pubsublite/types/paths.py b/google/cloud/pubsublite/types/paths.py
index 9038180a..3901afac 100644
--- a/google/cloud/pubsublite/types/paths.py
+++ b/google/cloud/pubsublite/types/paths.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import NamedTuple
+from typing import NamedTuple, Union
 
 from google.api_core.exceptions import InvalidArgument
 
@@ -20,23 +20,23 @@
 
 
 class LocationPath(NamedTuple):
-    project_number: int
+    project: Union[int, str]
     location: CloudZone
 
     def __str__(self):
-        return f"projects/{self.project_number}/locations/{self.location}"
+        return f"projects/{self.project}/locations/{self.location}"
 
 
 class TopicPath(NamedTuple):
-    project_number: int
+    project: Union[int, str]
     location: CloudZone
     name: str
 
     def __str__(self):
-        return f"projects/{self.project_number}/locations/{self.location}/topics/{self.name}"
+        return f"projects/{self.project}/locations/{self.location}/topics/{self.name}"
 
     def to_location_path(self):
-        return LocationPath(self.project_number, self.location)
+        return LocationPath(self.project, self.location)
 
     @staticmethod
     def parse(to_parse: str) -> "TopicPath":
@@ -51,27 +51,19 @@ def parse(to_parse: str) -> "TopicPath":
                 "Topic path must be formatted like projects/{project_number}/locations/{location}/topics/{name} but was instead "
                 + to_parse
             )
-        project_number: int
-        try:
-            project_number = int(splits[1])
-        except ValueError:
-            raise InvalidArgument(
-                "Topic path must be formatted like projects/{project_number}/locations/{location}/topics/{name} but was instead "
-                + to_parse
-            )
-        return TopicPath(project_number, CloudZone.parse(splits[3]), splits[5])
+        return TopicPath(splits[1], CloudZone.parse(splits[3]), splits[5])
 
 
 class SubscriptionPath(NamedTuple):
-    project_number: int
+    project: Union[int, str]
     location: CloudZone
     name: str
 
     def __str__(self):
-        return f"projects/{self.project_number}/locations/{self.location}/subscriptions/{self.name}"
+        return f"projects/{self.project}/locations/{self.location}/subscriptions/{self.name}"
 
     def to_location_path(self):
-        return LocationPath(self.project_number, self.location)
+        return LocationPath(self.project, self.location)
 
     @staticmethod
     def parse(to_parse: str) -> "SubscriptionPath":
@@ -86,12 +78,4 @@ def parse(to_parse: str) -> "SubscriptionPath":
                 "Subscription path must be formatted like projects/{project_number}/locations/{location}/subscriptions/{name} but was instead "
                 + to_parse
             )
-        project_number: int
-        try:
-            project_number = int(splits[1])
-        except ValueError:
-            raise InvalidArgument(
-                "Subscription path must be formatted like projects/{project_number}/locations/{location}/subscriptions/{name} but was instead "
-                + to_parse
-            )
-        return SubscriptionPath(project_number, CloudZone.parse(splits[3]), splits[5])
+        return SubscriptionPath(splits[1], CloudZone.parse(splits[3]), splits[5])
diff --git a/samples/snippets/quickstart_test.py b/samples/snippets/quickstart_test.py
index 499f0db5..470ca32f 100644
--- a/samples/snippets/quickstart_test.py
+++ b/samples/snippets/quickstart_test.py
@@ -73,7 +73,7 @@ def test_create_lite_topic_example(topic_path, capsys):
 
     topic_path_object = TopicPath.parse(topic_path)
     create_lite_topic_example.create_lite_topic(
-        topic_path_object.project_number,
+        topic_path_object.project,
         topic_path_object.location.region.name,
         topic_path_object.location.zone_id,
         topic_path_object.name,
@@ -88,7 +88,7 @@ def test_update_lite_topic_example(topic_path, capsys):
 
     topic_path_object = TopicPath.parse(topic_path)
     update_lite_topic_example.update_lite_topic(
-        topic_path_object.project_number,
+        topic_path_object.project,
         topic_path_object.location.region.name,
         topic_path_object.location.zone_id,
         topic_path_object.name,
@@ -102,7 +102,7 @@ def test_get_lite_topic_example(topic_path, capsys):
 
     topic_path_object = TopicPath.parse(topic_path)
     get_lite_topic_example.get_lite_topic(
-        topic_path_object.project_number,
+        topic_path_object.project,
         topic_path_object.location.region.name,
         topic_path_object.location.zone_id,
         topic_path_object.name,
@@ -116,7 +116,7 @@ def test_list_lite_topics_example(topic_path, capsys):
 
     topic_path_object = TopicPath.parse(topic_path)
     list_lite_topics_example.list_lite_topics(
-        topic_path_object.project_number,
+        topic_path_object.project,
         topic_path_object.location.region.name,
         topic_path_object.location.zone_id,
     )
@@ -131,7 +131,7 @@ def test_create_lite_subscription(subscription_path, topic_path, capsys):
     topic_path_object = TopicPath.parse(topic_path)
 
     create_lite_subscription_example.create_lite_subscription(
-        subscription_path_object.project_number,
+        subscription_path_object.project,
         subscription_path_object.location.region.name,
         subscription_path_object.location.zone_id,
         topic_path_object.name,
@@ -147,7 +147,7 @@ def test_update_lite_subscription_example(subscription_path, capsys):
     subscription_path_object = SubscriptionPath.parse(subscription_path)
 
     update_lite_subscription_example.update_lite_subscription(
-        subscription_path_object.project_number,
+        subscription_path_object.project,
         subscription_path_object.location.region.name,
         subscription_path_object.location.zone_id,
         subscription_path_object.name,
@@ -162,7 +162,7 @@ def test_get_lite_subscription(subscription_path, capsys):
     subscription_path_object = SubscriptionPath.parse(subscription_path)
 
     get_lite_subscription_example.get_lite_subscription(
-        subscription_path_object.project_number,
+        subscription_path_object.project,
         subscription_path_object.location.region.name,
         subscription_path_object.location.zone_id,
         subscription_path_object.name,
@@ -177,7 +177,7 @@ def test_list_lite_subscriptions_in_project(subscription_path, capsys):
     subscription_path_object = SubscriptionPath.parse(subscription_path)
 
     list_lite_subscriptions_in_project_example.list_lite_subscriptions_in_project(
-        subscription_path_object.project_number,
+        subscription_path_object.project,
         subscription_path_object.location.region.name,
         subscription_path_object.location.zone_id,
     )
@@ -192,7 +192,7 @@ def test_list_lite_subscriptions_in_topic(topic_path, subscription_path, capsys)
     topic_path_object = TopicPath.parse(topic_path)
 
     list_lite_subscriptions_in_topic_example.list_lite_subscriptions_in_topic(
-        subscription_path_object.project_number,
+        subscription_path_object.project,
         subscription_path_object.location.region.name,
         subscription_path_object.location.zone_id,
         topic_path_object.name,
@@ -267,7 +267,7 @@ def test_delete_lite_subscription_example(subscription_path, capsys):
     @backoff.on_exception(backoff.expo, AssertionError, max_time=MAX_TIME)
     def eventually_consistent_test():
         delete_lite_subscription_example.delete_lite_subscription(
-            subscription_path_object.project_number,
+            subscription_path_object.project,
             subscription_path_object.location.region.name,
             subscription_path_object.location.zone_id,
             subscription_path_object.name,
@@ -286,7 +286,7 @@ def test_delete_lite_topic_example(topic_path, capsys):
     @backoff.on_exception(backoff.expo, AssertionError, max_time=MAX_TIME)
     def eventually_consistent_test():
         delete_lite_topic_example.delete_lite_topic(
-            topic_path_object.project_number,
+            topic_path_object.project,
             topic_path_object.location.region.name,
             topic_path_object.location.zone_id,
             topic_path_object.name,