21396791

21,396,791 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21396791 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

21396791 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 21396791:

13 × 1645907

See below for interesting mathematical facts about the number 21396791 from the Numbermatics database.

Names of 21396791

Cardinal: 21396791 can be written as Twenty-one million, three hundred ninety-six thousand, seven hundred ninety-one.

Scientific notation

Scientific notation: 2.1396791 × 10⁷

Factors of 21396791

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 2
Sum of prime factors: 1645920

Divisors of 21396791

Number of divisors d(n): 4
Complete list of divisors:
1 13 1645907 21396791
Sum of all divisors σ(n): 23042712
Sum of proper divisors (its aliquot sum) s(n): 1645921
21396791 is a deficient number, because the sum of its proper divisors (1645921) is less than itself. Its deficiency is 19750870

Bases of 21396791

Binary: 1010001100111110100110111₂
Hexadecimal: 0x1467D37
Base-36: CQLVB

Squares and roots of 21396791

21396791 squared (21396791²) is 457822665097681
21396791 cubed (21396791³) is 9795935880158074941671
The square root of 21396791 is 4625.6665465639
The cube root of 21396791 is 277.6192318299

Scales and comparisons

How big is 21396791?

21,396,791 seconds is equal to 35 weeks, 2 days, 15 hours, 33 minutes, 11 seconds.
To count from 1 to 21,396,791 would take you about eleven 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 21396791 cubic inches would be around 23.1 feet tall.

Recreational maths with 21396791

21396791 backwards is 19769312
The number of decimal digits it has is: 8
The sum of 21396791's digits is 38
More coming soon!

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The information we have on file for 21396791 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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