20001

Math

is the integer between.

Properties

 * It is an odd number.
 * It is a sphenic number.
 * It is one more than a (very) round number. (20000)

&frac12;

 * $1⁄2$ is half of 40003.

20001¼

 * 20001¼ is a quarter of 80005.

20001¾

 * 20001¾ is a quarter of 80007.

Place value
2 ten thousands, 1 ones.