21499990

21,499,990 is an even composite number composed of four prime numbers multiplied together.

What does the number 21499990 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 24 divisors.

21499990 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of twenty-four divisors.

Prime factorization of 21499990:

2 × 5 × 41² × 1279

(2 × 5 × 41 × 41 × 1279)

See below for interesting mathematical facts about the number 21499990 from the Numbermatics database.

Names of 21499990

Cardinal: 21499990 can be written as Twenty-one million, four hundred ninety-nine thousand, nine hundred ninety.

Scientific notation

Scientific notation: 2.149999 × 10⁷

Factors of 21499990

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 5
Sum of prime factors: 1327

Divisors of 21499990

Number of divisors d(n): 24
Complete list of divisors:
1 2 5 10 41 82 205 410 1279 1681 2558 3362 6395 8405 12790 16810 52439 104878 262195 524390 2149999 4299998 10749995 21499990
Sum of all divisors σ(n): 39697920
Sum of proper divisors (its aliquot sum) s(n): 18197930
21499990 is a deficient number, because the sum of its proper divisors (18197930) is less than itself. Its deficiency is 3302060

Bases of 21499990

Binary: 1010010000001000001010110₂
Hexadecimal: 0x1481056
Base-36: CSTHY

Squares and roots of 21499990

21499990 squared (21499990²) is 462249570000100
21499990 cubed (21499990³) is 9938361132506449999000
The square root of 21499990 is 4636.8081694199
The cube root of 21499990 is 278.0648452153

Scales and comparisons

How big is 21499990?

21,499,990 seconds is equal to 35 weeks, 3 days, 20 hours, 13 minutes, 10 seconds.
To count from 1 to 21,499,990 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 21499990 cubic inches would be around 23.2 feet tall.

Recreational maths with 21499990

21499990 backwards is 09999412
The number of decimal digits it has is: 8
The sum of 21499990's digits is 43
More coming soon!

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The information we have on file for 21499990 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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