21447

21,447 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21447 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

21447 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

Prime factorization of 21447:

3² × 2383

(3 × 3 × 2383)

See below for interesting mathematical facts about the number 21447 from the Numbermatics database.

Names of 21447

Cardinal: 21447 can be written as Twenty-one thousand, four hundred forty-seven.

Scientific notation

Scientific notation: 2.1447 × 10⁴

Factors of 21447

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 3
Sum of prime factors: 2386

Divisors of 21447

Number of divisors d(n): 6
Complete list of divisors:
1 3 9 2383 7149 21447
Sum of all divisors σ(n): 30992
Sum of proper divisors (its aliquot sum) s(n): 9545
21447 is a deficient number, because the sum of its proper divisors (9545) is less than itself. Its deficiency is 11902

Bases of 21447

Binary: 101001111000111₂
Hexadecimal: 0x53C7
Base-36: GJR

Squares and roots of 21447

21447 squared (21447²) is 459973809
21447 cubed (21447³) is 9865058281623
The square root of 21447 is 146.4479429695
The cube root of 21447 is 27.7836212891

Scales and comparisons

How big is 21447?

21,447 seconds is equal to 5 hours, 57 minutes, 27 seconds.
To count from 1 to 21,447 would take you about five hours.

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
A cube with a volume of 21447 cubic inches would be around 2.3 feet tall.

Recreational maths with 21447

21447 backwards is 74412
The number of decimal digits it has is: 5
The sum of 21447's digits is 18
More coming soon!

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The information we have on file for 21447 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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