21006918

21,006,918 is an even composite number composed of three prime numbers multiplied together.

What does the number 21006918 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 32 divisors.

21006918 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of thirty-two divisors.

Prime factorization of 21006918:

2 × 3³ × 73³

(2 × 3 × 3 × 3 × 73 × 73 × 73)

See below for interesting mathematical facts about the number 21006918 from the Numbermatics database.

Names of 21006918

Cardinal: 21006918 can be written as Twenty-one million, six thousand, nine hundred eighteen.

Scientific notation

Scientific notation: 2.1006918 × 10⁷

Factors of 21006918

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 7
Sum of prime factors: 78

Divisors of 21006918

Number of divisors d(n): 32
Complete list of divisors:
1 2 3 6 9 18 27 54 73 146 219 438 657 1314 1971 3942 5329 10658 15987 31974 47961 95922 143883 287766 389017 778034 1167051 2334102 3501153 7002306 10503459 21006918
Sum of all divisors σ(n): 47330400
Sum of proper divisors (its aliquot sum) s(n): 26323482
21006918 is an abundant number, because the sum of its proper divisors (26323482) is greater than itself. Its abundance is 5316564

Bases of 21006918

Binary: 1010000001000101001000110₂
Hexadecimal: 0x1408A46
Base-36: CI91I

Squares and roots of 21006918

21006918 squared (21006918²) is 441290603858724
21006918 cubed (21006918³) is 9270155529430698652632
The square root of 21006918 is 4583.3304484839
The cube root of 21006918 is 275.9227099271

Scales and comparisons

How big is 21006918?

21,006,918 seconds is equal to 34 weeks, 5 days, 3 hours, 15 minutes, 18 seconds.
To count from 1 to 21,006,918 would take you about sixteen hours!

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 21006918 cubic inches would be around 23 feet tall.

Recreational maths with 21006918

21006918 backwards is 81960012
21006918 is a Harshad number.
The number of decimal digits it has is: 8
The sum of 21006918's digits is 27
More coming soon!

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The information we have on file for 21006918 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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