21203728

21,203,728 is an even composite number composed of four prime numbers multiplied together.

What does the number 21203728 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 40 divisors.

21203728 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of forty divisors.

Prime factorization of 21203728:

2⁴ × 7 × 13 × 14563

(2 × 2 × 2 × 2 × 7 × 13 × 14563)

See below for interesting mathematical facts about the number 21203728 from the Numbermatics database.

Names of 21203728

Cardinal: 21203728 can be written as Twenty-one million, two hundred three thousand, seven hundred twenty-eight.

Scientific notation

Scientific notation: 2.1203728 × 10⁷

Factors of 21203728

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 7
Sum of prime factors: 14585

Divisors of 21203728

Number of divisors d(n): 40
Complete list of divisors:
1 2 4 7 8 13 14 16 26 28 52 56 91 104 112 182 208 364 728 1456 14563 29126 58252 101941 116504 189319 203882 233008 378638 407764 757276 815528 1325233 1514552 1631056 2650466 3029104 5300932 10601864 21203728
Sum of all divisors σ(n): 50566208
Sum of proper divisors (its aliquot sum) s(n): 29362480
21203728 is an abundant number, because the sum of its proper divisors (29362480) is greater than itself. Its abundance is 8158752

Bases of 21203728

Binary: 1010000111000101100010000₂
Hexadecimal: 0x1438B10
Base-36: CMGWG

Squares and roots of 21203728

21203728 squared (21203728²) is 449598081097984
21203728 cubed (21203728³) is 9533155420923594084352
The square root of 21203728 is 4604.7505904229
The cube root of 21203728 is 276.7817227621

Scales and comparisons

How big is 21203728?

21,203,728 seconds is equal to 35 weeks, 9 hours, 55 minutes, 28 seconds.
To count from 1 to 21,203,728 would take you about four 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 21203728 cubic inches would be around 23.1 feet tall.

Recreational maths with 21203728

21203728 backwards is 82730212
The number of decimal digits it has is: 8
The sum of 21203728's digits is 25
More coming soon!

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The information we have on file for 21203728 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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