21,823 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21823 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

21823 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 21823:

139 × 157

See below for interesting mathematical facts about the number 21823 from the Numbermatics database.

Names of 21823

  • Cardinal: 21823 can be written as Twenty-one thousand, eight hundred twenty-three.

Scientific notation

  • Scientific notation: 2.1823 × 104

Factors of 21823

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 296

Divisors of 21823

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 22120
  • Sum of proper divisors (its aliquot sum) s(n): 297
  • 21823 is a deficient number, because the sum of its proper divisors (297) is less than itself. Its deficiency is 21526

Bases of 21823

  • Binary: 1010101001111112
  • Hexadecimal: 0x553F
  • Base-36: GU7

Squares and roots of 21823

  • 21823 squared (218232) is 476243329
  • 21823 cubed (218233) is 10393058168767
  • The square root of 21823 is 147.7260978975
  • The cube root of 21823 is 27.9450452739

Scales and comparisons

How big is 21823?
  • 21,823 seconds is equal to 6 hours, 3 minutes, 43 seconds.
  • To count from 1 to 21,823 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 21823 cubic inches would be around 2.3 feet tall.

Recreational maths with 21823

  • 21823 backwards is 32812
  • The number of decimal digits it has is: 5
  • The sum of 21823'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.

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 21823 - Facts about the integer". Numbermatics.com. 2023. Web. 3 December 2023.

APA style:
Numbermatics. (2023). Number 21823 - Facts about the integer. Retrieved 3 December 2023, from https://numbermatics.com/n/21823/

Chicago style:
Numbermatics. 2023. "Number 21823 - Facts about the integer". https://numbermatics.com/n/21823/

The information we have on file for 21823 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 21823, math, Factors of 21823, curriculum, school, college, exams, university, Prime factorization of 21823, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, eight hundred twenty-three.

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