Q: What is the negative version of the number 20,421,515?
A: -20,421,515
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:
| 20,421,513 | 20,421,514 | 20,421,516 | 20,421,517 |
| -20,421,513 | -20,421,514 | -20,421,516 | -20,421,517 |