21121521798

Names of 21121521798

• Cardinal: 21121521798 can be written as Twenty-one billion, one hundred twenty-one million, five hundred twenty-one thousand, seven hundred ninety-eight.

Scientific notation

• Scientific notation: 2.1121521798 × 10¹⁰

Factors of 21121521798

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1142

Divisors of 21121521798

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 6 13 19 26 38 39 57 67 78 114 134 201 247 281 402 494 562 741 757 843 871 1273 1482 1514 1686 1742 2271 2546 2613 3653 3819 4542 5226 5339 7306 7638 9841 10678 10959 14383 16017 16549 18827 19682 21918 28766 29523 32034 33098 37654 43149 49647 50719 56481 59046 69407 86298 99294 101438 112962 138814 152157 186979 208221 212717 244751 304314 357713 373958 416442 425434 489502 560937 638151 659347 715426 734253 963661 1073139 1121874 1276302 1318694 1468506 1927322 1978041 2146278 2765321 2890983 3956082 4041623 4650269 5530642 5781966 8083246 8295963 9300538 12124869 12527593 13950807 14252039 16591926 24249738 25055186 27901614 28504078 37582779 42756117 52541099 75165558 85512234 105082198 157623297 185276507 270788741 315246594 370553014 541577482 555829521 812366223 1111659042 1624732446 3520253633 7040507266 10560760899 21121521798
• Sum of all divisors σ(n): 48838970880
• Sum of proper divisors (its aliquot sum) s(n): 27717449082
• 21121521798 is an abundant number, because the sum of its proper divisors (27717449082) is greater than itself. Its abundance is 6595927284

Bases of 21121521798

• Binary: 10011101010111100001101100010000110₂
• Hexadecimal: 0x4EAF0D886
• Base-36: 9PB7IIU

Squares and roots of 21121521798

• 21121521798 squared (21121521798²) is 446118683063389152804
• 21121521798 cubed (21121521798³) is 9422705488818427406706438821592
• The square root of 21121521798 is 145332.4526662921
• The cube root of 21121521798 is 2764.2356809923

Scales and comparisons

• 21,121,521,798 seconds is equal to 671 years, 31 weeks, 1 day, 1 hour, 23 minutes, 18 seconds.
• To count from 1 to 21,121,521,798 would take you about one thousand, three hundred forty-three years!

  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 21121521798 cubic inches would be around 230.4 feet tall.

Recreational maths with 21121521798

• 21121521798 backwards is 89712512112
• 21121521798 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21121521798's digits is 39
• More coming soon!