Q: Is 21,500,643 an Even Number?
A: No, the number 21,500,643 is not an even number - it is an odd number.
An even number is any integer (a whole number) that can be divided by 2. If you can cleanly divide a number by 2, the number is even. If you divide by 2 and there is a remainder left, then the number is odd.
Let's try that calculation...
21,500,643 ÷ 2 = 10,750,321.5
Notice the number is not a whole number and has a remainder (the .5)? That means the number is an odd number.
Any number that ends in 2, 4, 6 or 8 is even. If the number is larger than 10, if it ends in 0 it is also an even number. They are even because they can be divided by 2 evenly.
Here are more examples of even and odd numbers in sequence:
| 21,500,641 | 21,500,642 | 21,500,644 | 21,500,645 |
| odd | even | even | odd |