Q: Is 21,763 a Prime Number?
A: No, 21,763 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 21763 can be evenly divided by 1 7 3,109 and 21,763, with no remainder.
Since 21,763 cannot be divided by just 1 and 21,763, it is not a prime number.