21382391

21,382,391 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21382391 look like?

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

21382391 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 21382391:

19² × 61 × 971

(19 × 19 × 61 × 971)

See below for interesting mathematical facts about the number 21382391 from the Numbermatics database.

Names of 21382391

Cardinal: 21382391 can be written as Twenty-one million, three hundred eighty-two thousand, three hundred ninety-one.

Scientific notation

Scientific notation: 2.1382391 × 10⁷

Factors of 21382391

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 4
Sum of prime factors: 1051

Divisors of 21382391

Number of divisors d(n): 12
Complete list of divisors:
1 19 61 361 971 1159 18449 22021 59231 350531 1125389 21382391
Sum of all divisors σ(n): 22960584
Sum of proper divisors (its aliquot sum) s(n): 1578193
21382391 is a deficient number, because the sum of its proper divisors (1578193) is less than itself. Its deficiency is 19804198

Bases of 21382391

Binary: 1010001100100010011110111₂
Hexadecimal: 0x14644F7
Base-36: CQARB

Squares and roots of 21382391

21382391 squared (21382391²) is 457206644876881
21382391 cubed (21382391³) is 9776171248555616402471
The square root of 21382391 is 4624.1097521577
The cube root of 21382391 is 277.5569387803

Scales and comparisons

How big is 21382391?

21,382,391 seconds is equal to 35 weeks, 2 days, 11 hours, 33 minutes, 11 seconds.
To count from 1 to 21,382,391 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 21382391 cubic inches would be around 23.1 feet tall.

Recreational maths with 21382391

21382391 backwards is 19328312
The number of decimal digits it has is: 8
The sum of 21382391's digits is 29
More coming soon!

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The information we have on file for 21382391 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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