Q: What is the negative version of the number 21,878,639?
A: -21,878,639
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:
| 21,878,637 | 21,878,638 | 21,878,640 | 21,878,641 |
| -21,878,637 | -21,878,638 | -21,878,640 | -21,878,641 |