I have many GAE projects (more than 60) that I have to map, clean, delete part of them. For some projects I have only "Project number". Is there a way to find out "Project Name" or "Project Id" having "Project number" without going to each project and check it manually?
You can find Project ID with project number by running this command:
gcloud projects list \
--filter='PROJECT_NUMBER=(PROJECT_NUMBER_1, ..., PROJECT_NUMBER_N)
Replace PROJECT_NUMBER_X with all the project numbers you have.
You can read more about filters and their syntax here.