21387538

21,387,538 is an even composite number composed of three prime numbers multiplied together.

What does the number 21387538 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 16 divisors.

21387538 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21387538:

2 × 47³ × 103

(2 × 47 × 47 × 47 × 103)

See below for interesting mathematical facts about the number 21387538 from the Numbermatics database.

Names of 21387538

Cardinal: 21387538 can be written as Twenty-one million, three hundred eighty-seven thousand, five hundred thirty-eight.

Scientific notation

Scientific notation: 2.1387538 × 10⁷

Factors of 21387538

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 5
Sum of prime factors: 152

Divisors of 21387538

Number of divisors d(n): 16
Complete list of divisors:
1 2 47 94 103 206 2209 4418 4841 9682 103823 207646 227527 455054 10693769 21387538
Sum of all divisors σ(n): 33096960
Sum of proper divisors (its aliquot sum) s(n): 11709422
21387538 is a deficient number, because the sum of its proper divisors (11709422) is less than itself. Its deficiency is 9678116

Bases of 21387538

Binary: 1010001100101100100010010₂
Hexadecimal: 0x1465912
Base-36: CQEQA

Squares and roots of 21387538

21387538 squared (21387538²) is 457426781701444
21387538 cubed (21387538³) is 9783232675857338204872
The square root of 21387538 is 4624.6662582289
The cube root of 21387538 is 277.5792074303

Scales and comparisons

How big is 21387538?

21,387,538 seconds is equal to 35 weeks, 2 days, 12 hours, 58 minutes, 58 seconds.
To count from 1 to 21,387,538 would take you about seven 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 21387538 cubic inches would be around 23.1 feet tall.

Recreational maths with 21387538

21387538 backwards is 83578312
The number of decimal digits it has is: 8
The sum of 21387538's digits is 37
More coming soon!

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The information we have on file for 21387538 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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