Q: What is the negative version of the number 21,581,691?
A: -21,581,691
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:
| 21,581,689 | 21,581,690 | 21,581,692 | 21,581,693 |
| -21,581,689 | -21,581,690 | -21,581,692 | -21,581,693 |