21386

21,386 is an even composite number composed of three prime numbers multiplied together.

What does the number 21386 look like?

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

21386 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 21386:

2 × 17² × 37

(2 × 17 × 17 × 37)

See below for interesting mathematical facts about the number 21386 from the Numbermatics database.

Names of 21386

Cardinal: 21386 can be written as Twenty-one thousand, three hundred eighty-six.

Scientific notation

Scientific notation: 2.1386 × 10⁴

Factors of 21386

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 4
Sum of prime factors: 56

Divisors of 21386

Number of divisors d(n): 12
Complete list of divisors:
1 2 17 34 37 74 289 578 629 1258 10693 21386
Sum of all divisors σ(n): 34998
Sum of proper divisors (its aliquot sum) s(n): 13612
21386 is a deficient number, because the sum of its proper divisors (13612) is less than itself. Its deficiency is 7774

Bases of 21386

Binary: 101001110001010₂
Hexadecimal: 0x538A
Base-36: GI2

Squares and roots of 21386

21386 squared (21386²) is 457360996
21386 cubed (21386³) is 9781122260456
The square root of 21386 is 146.2395295397
The cube root of 21386 is 27.7572553599

Scales and comparisons

How big is 21386?

21,386 seconds is equal to 5 hours, 56 minutes, 26 seconds.
To count from 1 to 21,386 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 21386 cubic inches would be around 2.3 feet tall.

Recreational maths with 21386

21386 backwards is 68312
The number of decimal digits it has is: 5
The sum of 21386's digits is 20
More coming soon!

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The information we have on file for 21386 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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