Q: What is the negative version of the number 21,531,509?
A: -21,531,509
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:
| 21,531,507 | 21,531,508 | 21,531,510 | 21,531,511 |
| -21,531,507 | -21,531,508 | -21,531,510 | -21,531,511 |