Q: What is the negative version of the number 21,638,615?
A: -21,638,615
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:
| 21,638,613 | 21,638,614 | 21,638,616 | 21,638,617 |
| -21,638,613 | -21,638,614 | -21,638,616 | -21,638,617 |