21,377 in words
21,377
twenty-one thousand three hundred seventy-seven
21,377 is written twenty-one thousand three hundred seventy-seven.
Ways to write it
- As an ordinal
- twenty-one thousand three hundred seventy-seventh
- Expanded form
- 20,000 + 1,000 + 300 + 70 + 7
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 3 | 300 |
| tens | 7 | 70 |
| ones | 7 | 7 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 21,377 (2 factors)
- First 10 multiples
- 21,377, 42,754, 64,131, 85,508, 106,885, 128,262, 149,639, 171,016, 192,393, 213,770
- Square
- 21,377 × 21,377 = 456,976,129
- Square root
- ≈ 146.21
- Sum of the digits
- 2 + 1 + 3 + 7 + 7 = 20
- Rounded to the nearest 10
- 21,380
- Rounded to the nearest 100
- 21,400
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,376
- Number after
- 21,378
- In binary
101001110000001
Quick check
What number comes just after 21,377?
Show the answer
21,378
Is 21,377 even or odd?
Show the answer
Odd
What is 21,377 + 10?
Show the answer
21,387
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Number Patterns
Find the missing number in a sequence.Frequently asked questions
How do you write 21,377 in words?
21,377 is written "twenty-one thousand three hundred seventy-seven".
Is 21,377 a prime number?
Yes. 21,377 is a prime number: its only factors are 1 and 21,377.
What are the factors of 21,377?
The factors of 21,377 are 1 and 21,377.