21156990

21,156,990 is an even composite number composed of five prime numbers multiplied together.

What does the number 21156990 look like?

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

21156990 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 21156990:

2 × 3 × 5 × 79² × 113

(2 × 3 × 5 × 79 × 79 × 113)

See below for interesting mathematical facts about the number 21156990 from the Numbermatics database.

Names of 21156990

Cardinal: 21156990 can be written as Twenty-one million, one hundred fifty-six thousand, nine hundred ninety.

Scientific notation

Scientific notation: 2.115699 × 10⁷

Factors of 21156990

Number of distinct prime factors ω(n): 5
Total number of prime factors Ω(n): 6
Sum of prime factors: 202

Divisors of 21156990

Number of divisors d(n): 48
Complete list of divisors:
1 2 3 5 6 10 15 30 79 113 158 226 237 339 395 474 565 678 790 1130 1185 1695 2370 3390 6241 8927 12482 17854 18723 26781 31205 37446 44635 53562 62410 89270 93615 133905 187230 267810 705233 1410466 2115699 3526165 4231398 7052330 10578495 21156990
Sum of all divisors σ(n): 51882768
Sum of proper divisors (its aliquot sum) s(n): 30725778
21156990 is an abundant number, because the sum of its proper divisors (30725778) is greater than itself. Its abundance is 9568788

Bases of 21156990

Binary: 1010000101101010001111110₂
Hexadecimal: 0x142D47E
Base-36: CLGU6

Squares and roots of 21156990

21156990 squared (21156990²) is 447618225860100
21156990 cubed (21156990³) is 9470254328339877099000
The square root of 21156990 is 4599.6728144513
The cube root of 21156990 is 276.5782091687

Scales and comparisons

How big is 21156990?

21,156,990 seconds is equal to 34 weeks, 6 days, 20 hours, 56 minutes, 30 seconds.
To count from 1 to 21,156,990 would take you about three 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 21156990 cubic inches would be around 23 feet tall.

Recreational maths with 21156990

21156990 backwards is 09965112
The number of decimal digits it has is: 8
The sum of 21156990's digits is 33
More coming soon!

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The information we have on file for 21156990 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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