21005312

21,005,312 is an even composite number composed of three prime numbers multiplied together.

What does the number 21005312 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 44 divisors.

21005312 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of forty-four divisors.

Prime factorization of 21005312:

2¹⁰ × 73 × 281

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 73 × 281)

See below for interesting mathematical facts about the number 21005312 from the Numbermatics database.

Names of 21005312

Cardinal: 21005312 can be written as Twenty-one million, five thousand, three hundred twelve.

Scientific notation

Scientific notation: 2.1005312 × 10⁷

Factors of 21005312

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 12
Sum of prime factors: 356

Divisors of 21005312

Number of divisors d(n): 44
Complete list of divisors:
1 2 4 8 16 32 64 73 128 146 256 281 292 512 562 584 1024 1124 1168 2248 2336 4496 4672 8992 9344 17984 18688 20513 35968 37376 41026 71936 74752 82052 143872 164104 287744 328208 656416 1312832 2625664 5251328 10502656 21005312
Sum of all divisors σ(n): 42716796
Sum of proper divisors (its aliquot sum) s(n): 21711484
21005312 is an abundant number, because the sum of its proper divisors (21711484) is greater than itself. Its abundance is 706172

Bases of 21005312

Binary: 1010000001000010000000000₂
Hexadecimal: 0x1408400
Base-36: CI7SW

Squares and roots of 21005312

21005312 squared (21005312²) is 441223132217344
21005312 cubed (21005312³) is 9268029553842562531328
The square root of 21005312 is 4583.1552450249
The cube root of 21005312 is 275.9156782249

Scales and comparisons

How big is 21005312?

21,005,312 seconds is equal to 34 weeks, 5 days, 2 hours, 48 minutes, 32 seconds.
To count from 1 to 21,005,312 would take you about sixteen 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 21005312 cubic inches would be around 23 feet tall.

Recreational maths with 21005312

21005312 backwards is 21350012
The number of decimal digits it has is: 8
The sum of 21005312's digits is 14
More coming soon!

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The information we have on file for 21005312 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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