Q: What is the negative version of the number 21,609,521?
A: -21,609,521
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:
| 21,609,519 | 21,609,520 | 21,609,522 | 21,609,523 |
| -21,609,519 | -21,609,520 | -21,609,522 | -21,609,523 |