21723940

21,723,940 is an even composite number composed of four prime numbers multiplied together.

What does the number 21723940 look like?

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

21723940 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 21723940:

2² × 5 × 7 × 155171

(2 × 2 × 5 × 7 × 155171)

See below for interesting mathematical facts about the number 21723940 from the Numbermatics database.

Names of 21723940

Cardinal: 21723940 can be written as Twenty-one million, seven hundred twenty-three thousand, nine hundred forty.

Scientific notation

Scientific notation: 2.172394 × 10⁷

Factors of 21723940

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 5
Sum of prime factors: 155185

Divisors of 21723940

Number of divisors d(n): 24
Complete list of divisors:
1 2 4 5 7 10 14 20 28 35 70 140 155171 310342 620684 775855 1086197 1551710 2172394 3103420 4344788 5430985 10861970 21723940
Sum of all divisors σ(n): 52137792
Sum of proper divisors (its aliquot sum) s(n): 30413852
21723940 is an abundant number, because the sum of its proper divisors (30413852) is greater than itself. Its abundance is 8689912

Bases of 21723940

Binary: 1010010110111101100100100₂
Hexadecimal: 0x14B7B24
Base-36: CXMAS

Squares and roots of 21723940

21723940 squared (21723940²) is 471929569123600
21723940 cubed (21723940³) is 10252169643866938984000
The square root of 21723940 is 4660.8947638839
The cube root of 21723940 is 279.0269797439

Scales and comparisons

How big is 21723940?

21,723,940 seconds is equal to 35 weeks, 6 days, 10 hours, 25 minutes, 40 seconds.
To count from 1 to 21,723,940 would take you about six 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 21723940 cubic inches would be around 23.3 feet tall.

Recreational maths with 21723940

21723940 backwards is 04932712
21723940 is a Harshad number.
The number of decimal digits it has is: 8
The sum of 21723940's digits is 28
More coming soon!

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The information we have on file for 21723940 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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