There are 5 starters from each team allowed on the floor. A total of 10 players.
Yes, you can only have a total of 12 players on a college basketball team.
According to nsga.org there 26.9 million Basketball players that participated in the US.
15 players at least
there are 5
Basketball players can request a number but if that number is taken of if the organization just doesn't want to give them that number than they have to get a new one.
usually basketball players use number 0-5 so that refs can signal their number when calling fouls..