Q: Is 21,456,789 a Prime Number?
A: No, 21,456,789 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 21456789 can be evenly divided by 1 3 7,152,263 and 21,456,789, with no remainder.
Since 21,456,789 cannot be divided by just 1 and 21,456,789, it is not a prime number.
| Number | 21,456,787 | 21,456,788 | 21,456,790 | 21,456,791 |
| Prime? | no | no | no | yes |