Q: What is the negative version of the number 21,666,421?
A: -21,666,421
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:
| 21,666,419 | 21,666,420 | 21,666,422 | 21,666,423 |
| -21,666,419 | -21,666,420 | -21,666,422 | -21,666,423 |