Q: What is the negative version of the number 21,561,643?
A: -21,561,643
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:
| 21,561,641 | 21,561,642 | 21,561,644 | 21,561,645 |
| -21,561,641 | -21,561,642 | -21,561,644 | -21,561,645 |