21969

21,969 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21969 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

21969 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

Prime factorization of 21969:

32 × 2441

(3 × 3 × 2441)

See below for interesting mathematical facts about the number 21969 from the Numbermatics database.


Names of 21969

  • Cardinal: 21969 can be written as Twenty-one thousand, nine hundred sixty-nine.

Scientific notation

  • Scientific notation: 2.1969 × 104

Factors of 21969

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 2444

Divisors of 21969

  • Number of divisors d(n): 6
  • Complete list of divisors:
  • Sum of all divisors σ(n): 31746
  • Sum of proper divisors (its aliquot sum) s(n): 9777
  • 21969 is a deficient number, because the sum of its proper divisors (9777) is less than itself. Its deficiency is 12192

Bases of 21969

  • Binary: 1010101110100012
  • Hexadecimal: 0x55D1
  • Base-36: GY9

Squares and roots of 21969

  • 21969 squared (219692) is 482636961
  • 21969 cubed (219693) is 10603051396209
  • The square root of 21969 is 148.2194319245
  • The cube root of 21969 is 28.0072260261

Scales and comparisons

How big is 21969?
  • 21,969 seconds is equal to 6 hours, 6 minutes, 9 seconds.
  • To count from 1 to 21,969 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 21969 cubic inches would be around 2.3 feet tall.

Recreational maths with 21969

  • 21969 backwards is 96912
  • The number of decimal digits it has is: 5
  • The sum of 21969'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.

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

Cite this page

MLA style:
"Number 21969 - Facts about the integer". Numbermatics.com. 2024. Web. 28 March 2024.

APA style:
Numbermatics. (2024). Number 21969 - Facts about the integer. Retrieved 28 March 2024, from https://numbermatics.com/n/21969/

Chicago style:
Numbermatics. 2024. "Number 21969 - Facts about the integer". https://numbermatics.com/n/21969/

The information we have on file for 21969 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 21969, math, Factors of 21969, curriculum, school, college, exams, university, Prime factorization of 21969, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, nine hundred sixty-nine.

Oh no. Javascript is switched off in your browser.
Some bits of this website may not work unless you switch it on.