21023829705

Names of 21023829705

• Cardinal: 21023829705 can be written as Twenty-one billion, twenty-three million, eight hundred twenty-nine thousand, seven hundred five.

Scientific notation

• Scientific notation: 2.1023829705 × 10¹⁰

Factors of 21023829705

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 691

Divisors of 21023829705

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 5 15 17 29 31 51 85 87 93 145 155 255 293 313 435 465 493 527 879 899 939 1465 1479 1565 1581 2465 2635 2697 4395 4495 4695 4981 5321 7395 7905 8497 9077 9083 9703 13485 14943 15283 15963 24905 25491 26605 27231 27249 29109 42485 45385 45415 45849 48515 74715 76415 79815 91709 127455 136155 136245 144449 145545 154309 154411 164951 229245 263407 275127 281387 433347 458545 462927 463233 494853 722245 771545 772055 790221 824755 844161 1317035 1375635 1406935 1559053 2166735 2314635 2316165 2474265 2659561 2842979 3951105 4220805 4477919 4677159 4783579 7795265 7978683 8528937 13297805 13433757 14214895 14350737 22389595 23385795 23917895 39893415 42644685 45212537 48330643 67168785 71753685 82446391 135637611 144991929 226062685 241653215 247339173 412231955 678188055 724959645 1236695865 1401588647 4204765941 7007943235 21023829705
• Sum of all divisors σ(n): 38285291520
• Sum of proper divisors (its aliquot sum) s(n): 17261461815
• 21023829705 is a deficient number, because the sum of its proper divisors (17261461815) is less than itself. Its deficiency is 3762367890

Bases of 21023829705

• Binary: 10011100101000111100010111011001001₂
• Hexadecimal: 0x4E51E2EC9
• Base-36: 9NP1MTL

Squares and roots of 21023829705

• 21023829705 squared (21023829705²) is 442001415464840387025
• 21023829705 cubed (21023829705³) is 9292562488101757711819891577625
• The square root of 21023829705 is 144995.9644438423
• The cube root of 21023829705 is 2759.9673430029

Scales and comparisons

• 21,023,829,705 seconds is equal to 668 years, 25 weeks, 4 days, 8 hours, 41 minutes, 45 seconds.
• To count from 1 to 21,023,829,705 would take you about one thousand, three hundred thirty-six 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 21023829705 cubic inches would be around 230 feet tall.

Recreational maths with 21023829705

• 21023829705 backwards is 50792832012
• The number of decimal digits it has is: 11
• The sum of 21023829705's digits is 39
• More coming soon!