Q: What is the negative version of the number 21,909,639?
A: -21,909,639
Negative numbers are usually written with - in front of them. They represent a number that is less than zero.
Here are more examples of negative numbers in sequence:
| 21,909,637 | 21,909,638 | 21,909,640 | 21,909,641 |
| -21,909,637 | -21,909,638 | -21,909,640 | -21,909,641 |