Q: What is the negative version of the number 21,531,515?
A: -21,531,515
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:
| 21,531,513 | 21,531,514 | 21,531,516 | 21,531,517 |
| -21,531,513 | -21,531,514 | -21,531,516 | -21,531,517 |