21381438

21,381,438 is an even composite number composed of four prime numbers multiplied together.

What does the number 21381438 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

21381438 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21381438:

2 × 3 × 13 × 274121

See below for interesting mathematical facts about the number 21381438 from the Numbermatics database.

Names of 21381438

Cardinal: 21381438 can be written as Twenty-one million, three hundred eighty-one thousand, four hundred thirty-eight.

Scientific notation

Scientific notation: 2.1381438 × 10⁷

Factors of 21381438

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 274139

Divisors of 21381438

Number of divisors d(n): 16
Complete list of divisors:
1 2 3 6 13 26 39 78 274121 548242 822363 1644726 3563573 7127146 10690719 21381438
Sum of all divisors σ(n): 46052496
Sum of proper divisors (its aliquot sum) s(n): 24671058
21381438 is an abundant number, because the sum of its proper divisors (24671058) is greater than itself. Its abundance is 3289620

Bases of 21381438

Binary: 1010001100100000100111110₂
Hexadecimal: 0x146413E
Base-36: CQA0U

Squares and roots of 21381438

21381438 squared (21381438²) is 457165890947844
21381438 cubed (21381438³) is 9774864153016087719672
The square root of 21381438 is 4624.0067041473
The cube root of 21381438 is 277.5528152049

Scales and comparisons

How big is 21381438?

21,381,438 seconds is equal to 35 weeks, 2 days, 11 hours, 17 minutes, 18 seconds.
To count from 1 to 21,381,438 would take you about four 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 21381438 cubic inches would be around 23.1 feet tall.

Recreational maths with 21381438

21381438 backwards is 83418312
The number of decimal digits it has is: 8
The sum of 21381438's digits is 30
More coming soon!

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The information we have on file for 21381438 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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