21840642

21,840,642 is an even composite number composed of four prime numbers multiplied together.

What does the number 21840642 look like?

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

21840642 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 21840642:

2 × 3² × 373 × 3253

(2 × 3 × 3 × 373 × 3253)

See below for interesting mathematical facts about the number 21840642 from the Numbermatics database.

Names of 21840642

Cardinal: 21840642 can be written as Twenty-one million, eight hundred forty thousand, six hundred forty-two.

Scientific notation

Scientific notation: 2.1840642 × 10⁷

Factors of 21840642

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 5
Sum of prime factors: 3631

Divisors of 21840642

Number of divisors d(n): 24
Complete list of divisors:
1 2 3 6 9 18 373 746 1119 2238 3253 3357 6506 6714 9759 19518 29277 58554 1213369 2426738 3640107 7280214 10920321 21840642
Sum of all divisors σ(n): 47462844
Sum of proper divisors (its aliquot sum) s(n): 25622202
21840642 is an abundant number, because the sum of its proper divisors (25622202) is greater than itself. Its abundance is 3781560

Bases of 21840642

Binary: 1010011010100001100000010₂
Hexadecimal: 0x14D4302
Base-36: D04CI

Squares and roots of 21840642

21840642 squared (21840642²) is 477013642972164
21840642 cubed (21840642³) is 10418284205270849889288
The square root of 21840642 is 4673.3972653735
The cube root of 21840642 is 279.5257362617

Scales and comparisons

How big is 21840642?

21,840,642 seconds is equal to 36 weeks, 18 hours, 50 minutes, 42 seconds.
To count from 1 to 21,840,642 would take you about two weeks!

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 21840642 cubic inches would be around 23.3 feet tall.

Recreational maths with 21840642

21840642 backwards is 24604812
The number of decimal digits it has is: 8
The sum of 21840642's digits is 27
More coming soon!

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The information we have on file for 21840642 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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