When my clients adds me as an admin on there Google Analytics account for the website I am going to manage. Each time a separate Account shows up on my Google analytics with a single property in it (that is the clients site).

Is it possible to merge all those accounts and keep them as properties under a Account I create, call it "Clients"

I currently have 20+ clients accounts and its getting overwhelming. Its would be great if I can move them to a single account and add each site as property.