Q: What is the negative version of the number 21,431,209?
A: -21,431,209
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:
| 21,431,207 | 21,431,208 | 21,431,210 | 21,431,211 |
| -21,431,207 | -21,431,208 | -21,431,210 | -21,431,211 |