Q: Is 21,826 a Prime Number?
A: No, 21,826 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 21826 can be evenly divided by 1 2 7 14 1,559 3,118 10,913 and 21,826, with no remainder.
Since 21,826 cannot be divided by just 1 and 21,826, it is not a prime number.