Q: Is 21,876 a Prime Number?
A: No, 21,876 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 21876 can be evenly divided by 1 2 3 4 6 12 1,823 3,646 5,469 7,292 10,938 and 21,876, with no remainder.
Since 21,876 cannot be divided by just 1 and 21,876, it is not a prime number.