21740

21,740 is an even composite number composed of three prime numbers multiplied together.

What does the number 21740 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

21740 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 21740:

2² × 5 × 1087

(2 × 2 × 5 × 1087)

See below for interesting mathematical facts about the number 21740 from the Numbermatics database.

Names of 21740

Cardinal: 21740 can be written as Twenty-one thousand, seven hundred forty.

Scientific notation

Scientific notation: 2.174 × 10⁴

Factors of 21740

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 4
Sum of prime factors: 1094

Divisors of 21740

Number of divisors d(n): 12
Complete list of divisors:
1 2 4 5 10 20 1087 2174 4348 5435 10870 21740
Sum of all divisors σ(n): 45696
Sum of proper divisors (its aliquot sum) s(n): 23956
21740 is an abundant number, because the sum of its proper divisors (23956) is greater than itself. Its abundance is 2216

Bases of 21740

Binary: 101010011101100₂
Hexadecimal: 0x54EC
Base-36: GRW

Squares and roots of 21740

21740 squared (21740²) is 472627600
21740 cubed (21740³) is 10274924024000
The square root of 21740 is 147.4449049647
The cube root of 21740 is 27.9095722177

Scales and comparisons

How big is 21740?

21,740 seconds is equal to 6 hours, 2 minutes, 20 seconds.
To count from 1 to 21,740 would take you about six hours.

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 21740 cubic inches would be around 2.3 feet tall.

Recreational maths with 21740

21740 backwards is 04712
The number of decimal digits it has is: 5
The sum of 21740's digits is 14
More coming soon!

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The information we have on file for 21740 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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