21208642

21,208,642 is an even composite number composed of four prime numbers multiplied together.

What does the number 21208642 look like?

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

21208642 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 21208642:

2 × 7 × 13 × 116531

See below for interesting mathematical facts about the number 21208642 from the Numbermatics database.

Names of 21208642

Cardinal: 21208642 can be written as Twenty-one million, two hundred eight thousand, six hundred forty-two.

Scientific notation

Scientific notation: 2.1208642 × 10⁷

Factors of 21208642

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 116553

Divisors of 21208642

Number of divisors d(n): 16
Complete list of divisors:
1 2 7 13 14 26 91 182 116531 233062 815717 1514903 1631434 3029806 10604321 21208642
Sum of all divisors σ(n): 39154752
Sum of proper divisors (its aliquot sum) s(n): 17946110
21208642 is a deficient number, because the sum of its proper divisors (17946110) is less than itself. Its deficiency is 3262532

Bases of 21208642

Binary: 1010000111001111001000010₂
Hexadecimal: 0x1439E42
Base-36: CMKOY

Squares and roots of 21208642

21208642 squared (21208642²) is 449806495484164
21208642 cubed (21208642³) is 9539784931998250945288
The square root of 21208642 is 4605.2841388995
The cube root of 21208642 is 276.8031026555

Scales and comparisons

How big is 21208642?

21,208,642 seconds is equal to 35 weeks, 11 hours, 17 minutes, 22 seconds.
To count from 1 to 21,208,642 would take you about four 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 21208642 cubic inches would be around 23.1 feet tall.

Recreational maths with 21208642

21208642 backwards is 24680212
The number of decimal digits it has is: 8
The sum of 21208642's digits is 25
More coming soon!

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The information we have on file for 21208642 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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