I think 20 hours at room temp is probably too much. That's an overnight proof and I'd normally do that in the fridge followed by a warm proof of the dough balls.
20 hours room temp could be totally fine, it's entirely dependent on the quantity of yeast. Water temp will also play a role (as will flour and bowl temp, and friction factor if you want to get reyt fancy).
@le_james
I think 20 hours at room temp is probably too much. That's an overnight proof and I'd normally do that in the fridge followed by a warm proof of the dough balls.