Q: What is the negative version of the number 21,506,509?
A: -21,506,509
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:
| 21,506,507 | 21,506,508 | 21,506,510 | 21,506,511 |
| -21,506,507 | -21,506,508 | -21,506,510 | -21,506,511 |