Q: Is 21,738 a Prime Number?
A: No, 21,738 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 21738 can be evenly divided by 1 2 3 6 3,623 7,246 10,869 and 21,738, with no remainder.
Since 21,738 cannot be divided by just 1 and 21,738, it is not a prime number.