Q: What is the negative version of the number 21,720,638?
A: -21,720,638
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:
| 21,720,636 | 21,720,637 | 21,720,639 | 21,720,640 |
| -21,720,636 | -21,720,637 | -21,720,639 | -21,720,640 |