21687993

21,687,993 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21687993 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 24 divisors.

21687993 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty-four divisors.

Prime factorization of 21687993:

3⁵ × 149 × 599

(3 × 3 × 3 × 3 × 3 × 149 × 599)

See below for interesting mathematical facts about the number 21687993 from the Numbermatics database.

Names of 21687993

Cardinal: 21687993 can be written as Twenty-one million, six hundred eighty-seven thousand, nine hundred ninety-three.

Scientific notation

Scientific notation: 2.1687993 × 10⁷

Factors of 21687993

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 7
Sum of prime factors: 751

Divisors of 21687993

Number of divisors d(n): 24
Complete list of divisors:
1 3 9 27 81 149 243 447 599 1341 1797 4023 5391 12069 16173 36207 48519 89251 145557 267753 803259 2409777 7229331 21687993
Sum of all divisors σ(n): 32760000
Sum of proper divisors (its aliquot sum) s(n): 11072007
21687993 is a deficient number, because the sum of its proper divisors (11072007) is less than itself. Its deficiency is 10615986

Bases of 21687993

Binary: 1010010101110111010111001₂
Hexadecimal: 0x14AEEB9
Base-36: CWUK9

Squares and roots of 21687993

21687993 squared (21687993²) is 470369040368049
21687993 cubed (21687993³) is 10201360454918964135657
The square root of 21687993 is 4657.0369335019
The cube root of 21687993 is 278.8729910979

Scales and comparisons

How big is 21687993?

21,687,993 seconds is equal to 35 weeks, 6 days, 26 minutes, 33 seconds.
To count from 1 to 21,687,993 would take you about five days!

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 21687993 cubic inches would be around 23.2 feet tall.

Recreational maths with 21687993

21687993 backwards is 39978612
The number of decimal digits it has is: 8
The sum of 21687993's digits is 45
More coming soon!

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The information we have on file for 21687993 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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