What does is this number?

21 thousands + 28 hundreds + 14 tens + 37 ones

The value is 23,977

Step-by-step explanation:

To find this number, start by multiplying the numbers by their wholes.

21 * 1,000 = 21,000

28 * 100 = 2,800

14 * 10 = 140

37 * 1 = 37

Now we add all of those numbers together.

21,000 + 2,800 + 140 + 37 = 23,977