Q: Is 21,189 a Prime Number?
A: No, 21,189 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 21189 can be evenly divided by 1 3 7 21 1,009 3,027 7,063 and 21,189, with no remainder.
Since 21,189 cannot be divided by just 1 and 21,189, it is not a prime number.