21913821

21,913,821 is an odd composite number composed of four prime numbers multiplied together.

What does the number 21913821 look like?

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

21913821 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of forty divisors.

Prime factorization of 21913821:

3⁴ × 19 × 29 × 491

(3 × 3 × 3 × 3 × 19 × 29 × 491)

See below for interesting mathematical facts about the number 21913821 from the Numbermatics database.

Names of 21913821

Cardinal: 21913821 can be written as Twenty-one million, nine hundred thirteen thousand, eight hundred twenty-one.

Scientific notation

Scientific notation: 2.1913821 × 10⁷

Factors of 21913821

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 7
Sum of prime factors: 542

Divisors of 21913821

Number of divisors d(n): 40
Complete list of divisors:
1 3 9 19 27 29 57 81 87 171 261 491 513 551 783 1473 1539 1653 2349 4419 4959 9329 13257 14239 14877 27987 39771 42717 44631 83961 128151 251883 270541 384453 755649 811623 1153359 2434869 7304607 21913821
Sum of all divisors σ(n): 35719200
Sum of proper divisors (its aliquot sum) s(n): 13805379
21913821 is a deficient number, because the sum of its proper divisors (13805379) is less than itself. Its deficiency is 8108442

Bases of 21913821

Binary: 1010011100110000011011101₂
Hexadecimal: 0x14E60DD
Base-36: D1OT9

Squares and roots of 21913821

21913821 squared (21913821²) is 480215550820041
21913821 cubed (21913821³) is 10523357622086781686661
The square root of 21913821 is 4681.2200332819
The cube root of 21913821 is 279.8375801229

Scales and comparisons

How big is 21913821?

21,913,821 seconds is equal to 36 weeks, 1 day, 15 hours, 10 minutes, 21 seconds.
To count from 1 to 21,913,821 would take you about two weeks!

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 21913821 cubic inches would be around 23.3 feet tall.

Recreational maths with 21913821

21913821 backwards is 12831912
21913821 is a Harshad number.
The number of decimal digits it has is: 8
The sum of 21913821's digits is 27
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/21913821/?utm_source=shared">Number 21913821 - 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/21913821/?utm_source=shared]Number 21913821 - Facts about the integer[/url]

Cite this page

MLA style:
"Number 21913821 - Facts about the integer". Numbermatics.com. 2024. Web. 16 May 2024.

APA style:
Numbermatics. (2024). Number 21913821 - Facts about the integer. Retrieved 16 May 2024, from https://numbermatics.com/n/21913821/

Chicago style:
Numbermatics. 2024. "Number 21913821 - Facts about the integer". https://numbermatics.com/n/21913821/

The information we have on file for 21913821 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 21913821, math, Factors of 21913821, curriculum, school, college, exams, university, Prime factorization of 21913821, STEM, science, technology, engineering, physics, economics, calculator, twenty-one million, nine hundred thirteen thousand, eight hundred twenty-one.