21138018

21,138,018 is an even composite number composed of four prime numbers multiplied together.

What does the number 21138018 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

21138018 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21138018:

2 × 3 × 11 × 320273

See below for interesting mathematical facts about the number 21138018 from the Numbermatics database.

Names of 21138018

Cardinal: 21138018 can be written as Twenty-one million, one hundred thirty-eight thousand and eighteen.

Scientific notation

Scientific notation: 2.1138018 × 10⁷

Factors of 21138018

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 320289

Divisors of 21138018

Number of divisors d(n): 16
Complete list of divisors:
1 2 3 6 11 22 33 66 320273 640546 960819 1921638 3523003 7046006 10569009 21138018
Sum of all divisors σ(n): 46119456
Sum of proper divisors (its aliquot sum) s(n): 24981438
21138018 is an abundant number, because the sum of its proper divisors (24981438) is greater than itself. Its abundance is 3843420

Bases of 21138018

Binary: 1010000101000101001100010₂
Hexadecimal: 0x1428A62
Base-36: CL276

Squares and roots of 21138018

21138018 squared (21138018²) is 446815804968324
21138018 cubed (21138018³) is 9444800528104922141832
The square root of 21138018 is 4597.6100313097
The cube root of 21138018 is 276.4955129217

Scales and comparisons

How big is 21138018?

21,138,018 seconds is equal to 34 weeks, 6 days, 15 hours, 40 minutes, 18 seconds.
To count from 1 to 21,138,018 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 21138018 cubic inches would be around 23 feet tall.

Recreational maths with 21138018

21138018 backwards is 81083112
The number of decimal digits it has is: 8
The sum of 21138018's digits is 24
More coming soon!

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The information we have on file for 21138018 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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