21123920

21,123,920 is an even composite number composed of four prime numbers multiplied together.

What does the number 21123920 look like?

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

21123920 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 21123920:

2⁴ × 5 × 71 × 3719

(2 × 2 × 2 × 2 × 5 × 71 × 3719)

See below for interesting mathematical facts about the number 21123920 from the Numbermatics database.

Names of 21123920

Cardinal: 21123920 can be written as Twenty-one million, one hundred twenty-three thousand, nine hundred twenty.

Scientific notation

Scientific notation: 2.112392 × 10⁷

Factors of 21123920

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 7
Sum of prime factors: 3797

Divisors of 21123920

Number of divisors d(n): 40
Complete list of divisors:
1 2 4 5 8 10 16 20 40 71 80 142 284 355 568 710 1136 1420 2840 3719 5680 7438 14876 18595 29752 37190 59504 74380 148760 264049 297520 528098 1056196 1320245 2112392 2640490 4224784 5280980 10561960 21123920
Sum of all divisors σ(n): 49818240
Sum of proper divisors (its aliquot sum) s(n): 28694320
21123920 is an abundant number, because the sum of its proper divisors (28694320) is greater than itself. Its abundance is 7570400

Bases of 21123920

Binary: 1010000100101001101010000₂
Hexadecimal: 0x1425350
Base-36: CKRBK

Squares and roots of 21123920

21123920 squared (21123920²) is 446219996166400
21123920 cubed (21123920³) is 9425915501419340288000
The square root of 21123920 is 4596.0765876997
The cube root of 21123920 is 276.4340296949

Scales and comparisons

How big is 21123920?

21,123,920 seconds is equal to 34 weeks, 6 days, 11 hours, 45 minutes, 20 seconds.
To count from 1 to 21,123,920 would take you about two 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 21123920 cubic inches would be around 23 feet tall.

Recreational maths with 21123920

21123920 backwards is 02932112
21123920 is a Harshad number.
The number of decimal digits it has is: 8
The sum of 21123920's digits is 20
More coming soon!

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The information we have on file for 21123920 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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