Betta Fish: Should I put my Betta in a 20 gallon?

Hi, just wondering if it’s a good idea or not to put my betta in this tank. There’s currently 4 green cories in there and some otos. My betta has been in a tank with a Cory before and he mostly left them alone, sometimes he would chase it but never attack. The tank is fully planted and if I put him in there, I have a little floating hide that I would put in there. Just thinking about it and would like some insight. Thank you!