with those stats you shouldn't have a hard time getting in to most schools, but then again you have to be well rounded... I would say apply to 4-8 schools that you really want to go to, and maybe a few "back up" schools....better to be safe then sorry
i had a 19 AA and a 3.7, applied to 11 schools, interviewed at 5, accepted at 3. if i had a 22 i prolly would've still applied to 7-8. do whatever you want.
I did 8 and got into enough but I think this is one area where you don't want to cut it too close. You don't want to tempt fate and for whatever reason not get into a school/a school that you would want to go. You don't want to have wait a cycle and start over. Luckily I had some options and got to pick the school that was right for me.
It kinda sucks paying those extra fees and paying for those interview trips but I think spending an extra grand or so in applying to those extra schools is a sound investment.
p.s. when you don't apply to a lot of school be sure to do your homework on the ones you do apply to so you make sure that you have a good chance of getting in.