21429891

21,429,891 is an odd composite number composed of four prime numbers multiplied together.

What does the number 21429891 look like?

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

21429891 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of twenty-four divisors.

Prime factorization of 21429891:

3² × 7 × 19 × 17903

(3 × 3 × 7 × 19 × 17903)

See below for interesting mathematical facts about the number 21429891 from the Numbermatics database.

Names of 21429891

Cardinal: 21429891 can be written as Twenty-one million, four hundred twenty-nine thousand, eight hundred ninety-one.

Scientific notation

Scientific notation: 2.1429891 × 10⁷

Factors of 21429891

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 5
Sum of prime factors: 17932

Divisors of 21429891

Number of divisors d(n): 24
Complete list of divisors:
1 3 7 9 19 21 57 63 133 171 399 1197 17903 53709 125321 161127 340157 375963 1020471 1127889 2381099 3061413 7143297 21429891
Sum of all divisors σ(n): 37240320
Sum of proper divisors (its aliquot sum) s(n): 15810429
21429891 is a deficient number, because the sum of its proper divisors (15810429) is less than itself. Its deficiency is 5619462

Bases of 21429891

Binary: 1010001101111111010000011₂
Hexadecimal: 0x146FE83
Base-36: CRBER

Squares and roots of 21429891

21429891 squared (21429891²) is 459240228271881
21429891 cubed (21429891³) is 9841468034681528194971
The square root of 21429891 is 4629.2430266729
The cube root of 21429891 is 277.7623134443

Scales and comparisons

How big is 21429891?

21,429,891 seconds is equal to 35 weeks, 3 days, 44 minutes, 51 seconds.
To count from 1 to 21,429,891 would take you about seven minutes!

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 21429891 cubic inches would be around 23.1 feet tall.

Recreational maths with 21429891

21429891 backwards is 19892412
The number of decimal digits it has is: 8
The sum of 21429891's digits is 36
More coming soon!

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The information we have on file for 21429891 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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