21207920

21,207,920 is an even composite number composed of four prime numbers multiplied together.

What does the number 21207920 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 40 divisors.

21207920 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of forty divisors.

Prime factorization of 21207920:

2⁴ × 5 × 179 × 1481

(2 × 2 × 2 × 2 × 5 × 179 × 1481)

See below for interesting mathematical facts about the number 21207920 from the Numbermatics database.

Names of 21207920

Cardinal: 21207920 can be written as Twenty-one million, two hundred seven thousand, nine hundred twenty.

Scientific notation

Scientific notation: 2.120792 × 10⁷

Factors of 21207920

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 7
Sum of prime factors: 1667

Divisors of 21207920

Number of divisors d(n): 40
Complete list of divisors:
1 2 4 5 8 10 16 20 40 80 179 358 716 895 1432 1481 1790 2864 2962 3580 5924 7160 7405 11848 14320 14810 23696 29620 59240 118480 265099 530198 1060396 1325495 2120792 2650990 4241584 5301980 10603960 21207920
Sum of all divisors σ(n): 49617360
Sum of proper divisors (its aliquot sum) s(n): 28409440
21207920 is an abundant number, because the sum of its proper divisors (28409440) is greater than itself. Its abundance is 7201520

Bases of 21207920

Binary: 1010000111001101101110000₂
Hexadecimal: 0x1439B70
Base-36: CMK4W

Squares and roots of 21207920

21207920 squared (21207920²) is 449775870726400
21207920 cubed (21207920³) is 9538810684295833088000
The square root of 21207920 is 4605.2057500181
The cube root of 21207920 is 276.7999615757

Scales and comparisons

How big is 21207920?

21,207,920 seconds is equal to 35 weeks, 11 hours, 5 minutes, 20 seconds.
To count from 1 to 21,207,920 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 21207920 cubic inches would be around 23.1 feet tall.

Recreational maths with 21207920

21207920 backwards is 02970212
The number of decimal digits it has is: 8
The sum of 21207920's digits is 23
More coming soon!

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The information we have on file for 21207920 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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