Q: What is the negative version of the number 21,688,406?
A: -21,688,406
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:
| 21,688,404 | 21,688,405 | 21,688,407 | 21,688,408 |
| -21,688,404 | -21,688,405 | -21,688,407 | -21,688,408 |