Q: Is 21,370 a Prime Number?
A: No, 21,370 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 21370 can be evenly divided by 1 2 5 10 2,137 4,274 10,685 and 21,370, with no remainder.
Since 21,370 cannot be divided by just 1 and 21,370, it is not a prime number.