Q: What is the negative version of the number 21,512,209?
A: -21,512,209
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:
| 21,512,207 | 21,512,208 | 21,512,210 | 21,512,211 |
| -21,512,207 | -21,512,208 | -21,512,210 | -21,512,211 |