21418991

21,418,991 is an odd composite number composed of four prime numbers multiplied together.

What does the number 21418991 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

21418991 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21418991:

11 × 61 × 137 × 233

See below for interesting mathematical facts about the number 21418991 from the Numbermatics database.

Names of 21418991

Cardinal: 21418991 can be written as Twenty-one million, four hundred eighteen thousand, nine hundred ninety-one.

Scientific notation

Scientific notation: 2.1418991 × 10⁷

Factors of 21418991

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 442

Divisors of 21418991

Number of divisors d(n): 16
Complete list of divisors:
1 11 61 137 233 671 1507 2563 8357 14213 31921 91927 156343 351131 1947181 21418991
Sum of all divisors σ(n): 24025248
Sum of proper divisors (its aliquot sum) s(n): 2606257
21418991 is a deficient number, because the sum of its proper divisors (2606257) is less than itself. Its deficiency is 18812734

Bases of 21418991

Binary: 1010001101101001111101111₂
Hexadecimal: 0x146D3EF
Base-36: CR2ZZ

Squares and roots of 21418991

21418991 squared (21418991²) is 458773175458081
21418991 cubed (21418991³) is 9826458516178057816271
The square root of 21418991 is 4628.0655786193
The cube root of 21418991 is 277.7152122143

Scales and comparisons

How big is 21418991?

21,418,991 seconds is equal to 35 weeks, 2 days, 21 hours, 43 minutes, 11 seconds.
To count from 1 to 21,418,991 would take you about twenty 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 21418991 cubic inches would be around 23.1 feet tall.

Recreational maths with 21418991

21418991 backwards is 19981412
The number of decimal digits it has is: 8
The sum of 21418991's digits is 35
More coming soon!

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The information we have on file for 21418991 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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