20,840 in words
20,840
twenty thousand eight hundred forty
20,840 is written twenty thousand eight hundred forty.
Ways to write it
- As an ordinal
- twenty thousand eight hundred fortieth
- Expanded form
- 20,000 + 800 + 40
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 0 | 0 |
| hundreds | 8 | 800 |
| tens | 4 | 40 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 8, 10, 20, 40, 521, 1,042, 2,084, 2,605, 4,168, 5,210, 10,420 and 20,840 (16 factors)
- First 10 multiples
- 20,840, 41,680, 62,520, 83,360, 104,200, 125,040, 145,880, 166,720, 187,560, 208,400
- Square
- 20,840 × 20,840 = 434,305,600
- Square root
- ≈ 144.36
- Sum of the digits
- 2 + 0 + 8 + 4 + 0 = 14
- Rounded to the nearest 10
- 20,840
- Rounded to the nearest 100
- 20,800
- Rounded to the nearest 1000
- 21,000
- Number before
- 20,839
- Number after
- 20,841
- In binary
101000101101000
Quick check
What number comes just after 20,840?
Show the answer
20,841
Is 20,840 even or odd?
Show the answer
Even
What is 20,840 + 10?
Show the answer
20,850
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Number Patterns
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How do you write 20,840 in words?
20,840 is written "twenty thousand eight hundred forty".
Is 20,840 a prime number?
No. 20,840 is a composite number, because it has more than two factors.
What are the factors of 20,840?
The factors of 20,840 are 1, 2, 4, 5, 8, 10, 20, 40, 521, 1,042, 2,084, 2,605, 4,168, 5,210, 10,420 and 20,840.