21081940

21,081,940 is an even composite number composed of five prime numbers multiplied together.

What does the number 21081940 look like?

This visualization shows the relationship between its 5 prime factors (large circles) and 48 divisors.

21081940 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of forty-eight divisors.

Prime factorization of 21081940:

2² × 5 × 11 × 79 × 1213

(2 × 2 × 5 × 11 × 79 × 1213)

See below for interesting mathematical facts about the number 21081940 from the Numbermatics database.

Names of 21081940

Cardinal: 21081940 can be written as Twenty-one million, eighty-one thousand, nine hundred forty.

Scientific notation

Scientific notation: 2.108194 × 10⁷

Factors of 21081940

Number of distinct prime factors ω(n): 5
Total number of prime factors Ω(n): 6
Sum of prime factors: 1310

Divisors of 21081940

Number of divisors d(n): 48
Complete list of divisors:
1 2 4 5 10 11 20 22 44 55 79 110 158 220 316 395 790 869 1213 1580 1738 2426 3476 4345 4852 6065 8690 12130 13343 17380 24260 26686 53372 66715 95827 133430 191654 266860 383308 479135 958270 1054097 1916540 2108194 4216388 5270485 10540970 21081940
Sum of all divisors σ(n): 48948480
Sum of proper divisors (its aliquot sum) s(n): 27866540
21081940 is an abundant number, because the sum of its proper divisors (27866540) is greater than itself. Its abundance is 6784600

Bases of 21081940

Binary: 1010000011010111101010100₂
Hexadecimal: 0x141AF54
Base-36: CJUXG

Squares and roots of 21081940

21081940 squared (21081940²) is 444448194163600
21081940 cubed (21081940³) is 9369830162465365384000
The square root of 21081940 is 4591.5073777573
The cube root of 21081940 is 276.2507872461

Scales and comparisons

How big is 21081940?

21,081,940 seconds is equal to 34 weeks, 6 days, 5 minutes, 40 seconds.
To count from 1 to 21,081,940 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 21081940 cubic inches would be around 23 feet tall.

Recreational maths with 21081940

21081940 backwards is 04918012
The number of decimal digits it has is: 8
The sum of 21081940's digits is 25
More coming soon!

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The information we have on file for 21081940 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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