Q: What is the negative version of the number 21,511,215?
A: -21,511,215
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:
| 21,511,213 | 21,511,214 | 21,511,216 | 21,511,217 |
| -21,511,213 | -21,511,214 | -21,511,216 | -21,511,217 |