Q: What is the negative version of the number 21,515,511?
A: -21,515,511
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:
| 21,515,509 | 21,515,510 | 21,515,512 | 21,515,513 |
| -21,515,509 | -21,515,510 | -21,515,512 | -21,515,513 |