21663

21,663 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21663 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

21663 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 21663:

3² × 29 × 83

(3 × 3 × 29 × 83)

See below for interesting mathematical facts about the number 21663 from the Numbermatics database.

Names of 21663

Cardinal: 21663 can be written as Twenty-one thousand, six hundred sixty-three.

Scientific notation

Scientific notation: 2.1663 × 10⁴

Factors of 21663

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 4
Sum of prime factors: 115

Divisors of 21663

Number of divisors d(n): 12
Complete list of divisors:
1 3 9 29 83 87 249 261 747 2407 7221 21663
Sum of all divisors σ(n): 32760
Sum of proper divisors (its aliquot sum) s(n): 11097
21663 is a deficient number, because the sum of its proper divisors (11097) is less than itself. Its deficiency is 10566

Bases of 21663

Binary: 101010010011111₂
Hexadecimal: 0x549F
Base-36: GPR

Squares and roots of 21663

21663 squared (21663²) is 469285569
21663 cubed (21663³) is 10166133281247
The square root of 21663 is 147.1835588645
The cube root of 21663 is 27.8765826553

Scales and comparisons

How big is 21663?

21,663 seconds is equal to 6 hours, 1 minute, 3 seconds.
To count from 1 to 21,663 would take you about six 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 21663 cubic inches would be around 2.3 feet tall.

Recreational maths with 21663

21663 backwards is 36612
The number of decimal digits it has is: 5
The sum of 21663's digits is 18
More coming soon!

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The information we have on file for 21663 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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