Q: What is the negative version of the number 21,809,107?
A: -21,809,107
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:
| 21,809,105 | 21,809,106 | 21,809,108 | 21,809,109 |
| -21,809,105 | -21,809,106 | -21,809,108 | -21,809,109 |