Q: What is the negative version of the number 21,451,661?
A: -21,451,661
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:
| 21,451,659 | 21,451,660 | 21,451,662 | 21,451,663 |
| -21,451,659 | -21,451,660 | -21,451,662 | -21,451,663 |