Thousands with a one-digit final group
21,009 splits into 21 | 009. The left group gives “twenty-one thousand”; the right group contributes only “nine”.
21009 in words: twenty-one thousand nine
21,009
In words
Twenty-one thousand nine
Check another number
How 21,009 is built
Pattern: Thousands with a one-digit final group
21,009 splits into 21 | 009. The left group gives “twenty-one thousand”; the right group contributes only “nine”.
Digit and place-value table
| Digit | Position | Value | Value in words |
|---|---|---|---|
| 2 | ten-thousands | 20,000 | twenty thousand |
| 1 | thousands | 1,000 | one thousand |
| 0 | hundreds | 0 | not spoken |
| 0 | tens | 0 | not spoken |
| 9 | ones | 9 | nine |
Reading the number in groups
| Group | Digits | Reading |
|---|---|---|
| thousands | 21 | twenty-one thousand |
| final group | 009 | nine |
Why 21,009 is written this way
Group boundary: 21 | 009
The comma boundary separates 21 from 009: “twenty-one thousand” is read before “nine”.
Silent zero positions
The hundreds and tens positions contain zero. They preserve place value in the numeral but add no spoken word.
Hyphenation
The spelling contains one hyphen. Each hyphen joins a tens word to a non-zero ones word inside the same two-digit group.
Number structure
- 21,009 has 5 digits and 2 place-value groups.
- 3 positions contribute a spoken value; 2 zero positions are silent.
- Its thousands group is 21; its final three-digit group is 009.