21904

21,904 is an even composite number composed of two prime numbers multiplied together.

What does the number 21904 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 15 divisors.

21904 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of fifteen divisors.

Prime factorization of 21904:

2⁴ × 37²

(2 × 2 × 2 × 2 × 37 × 37)

See below for interesting mathematical facts about the number 21904 from the Numbermatics database.

Names of 21904

Cardinal: 21904 can be written as Twenty-one thousand, nine hundred four.

Scientific notation

Scientific notation: 2.1904 × 10⁴

Factors of 21904

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 6
Sum of prime factors: 39

Divisors of 21904

Number of divisors d(n): 15
Complete list of divisors:
1 2 4 8 16 37 74 148 296 592 1369 2738 5476 10952 21904
Sum of all divisors σ(n): 43617
Sum of proper divisors (its aliquot sum) s(n): 21713
21904 is a deficient number, because the sum of its proper divisors (21713) is less than itself. Its deficiency is 191

Bases of 21904

Binary: 101010110010000₂
Hexadecimal: 0x5590
Base-36: GWG

Squares and roots of 21904

21904 squared (21904²) is 479785216
21904 cubed (21904³) is 10509215371264
21904 is a perfect square number. Its square root is 148
The cube root of 21904 is 27.9795769439

Scales and comparisons

How big is 21904?

21,904 seconds is equal to 6 hours, 5 minutes, 4 seconds.
To count from 1 to 21,904 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 21904 cubic inches would be around 2.3 feet tall.

Recreational maths with 21904

21904 backwards is 40912
21904 is a Harshad number.
The number of decimal digits it has is: 5
The sum of 21904's digits is 16
More coming soon!

Copy this link to share with anyone:

Share this page on social media:

Link to this page

HTML: To link to this page, just copy and paste the link below into your blog, web page or email.

<a href="https://numbermatics.com/n/21904/?utm_source=shared">Number 21904 - Facts about the integer</a>

BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:

[url=https://numbermatics.com/n/21904/?utm_source=shared]Number 21904 - Facts about the integer[/url]

Cite this page

MLA style:
"Number 21904 - Facts about the integer". Numbermatics.com. 2024. Web. 27 April 2024.

APA style:
Numbermatics. (2024). Number 21904 - Facts about the integer. Retrieved 27 April 2024, from https://numbermatics.com/n/21904/

Chicago style:
Numbermatics. 2024. "Number 21904 - Facts about the integer". https://numbermatics.com/n/21904/

The information we have on file for 21904 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!

Keywords: Divisors of 21904, math, Factors of 21904, curriculum, school, college, exams, university, Prime factorization of 21904, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, nine hundred four.