21272784990

Names of 21272784990

• Cardinal: 21272784990 can be written as Twenty-one billion, two hundred seventy-two million, seven hundred eighty-four thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 2.127278499 × 10¹⁰

Factors of 21272784990

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 8162

Divisors of 21272784990

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 10 15 29 30 43 58 71 86 87 129 142 145 174 213 215 258 290 355 426 430 435 645 710 870 1065 1247 1290 2059 2130 2494 3053 3741 4118 6106 6177 6235 7482 8009 9159 10295 12354 12470 15265 16018 18318 18705 20590 24027 30530 30885 37410 40045 45795 48054 61770 80090 88537 91590 120135 177074 232261 240270 265611 344387 442685 464522 531222 568639 688774 696783 885370 1033161 1137278 1161305 1328055 1393566 1705917 1721935 2066322 2322610 2656110 2843195 3411834 3443870 3483915 5165805 5686390 6967830 8529585 9987223 10331610 16490531 17059170 19974446 24451477 29961669 32981062 48902954 49471593 49936115 59923338 73354431 82452655 98943186 99872230 122257385 146708862 149808345 164905310 244514770 247357965 299616690 366772155 494715930 709092833 733544310 1418185666 2127278499 3545464165 4254556998 7090928330 10636392495 21272784990
• Sum of all divisors σ(n): 54811468800
• Sum of proper divisors (its aliquot sum) s(n): 33538683810
• 21272784990 is an abundant number, because the sum of its proper divisors (33538683810) is greater than itself. Its abundance is 12265898820

Bases of 21272784990

• Binary: 10011110011111101001111000001011110₂
• Hexadecimal: 0x4F3F4F05E
• Base-36: 9RT9LY6

Squares and roots of 21272784990

• 21272784990 squared (21272784990²) is 452531381230769300100
• 21272784990 cubed (21272784990³) is 9626602774149876893320085499000
• The square root of 21272784990 is 145851.9283040163
• The cube root of 21272784990 is 2770.8187438435

Scales and comparisons

• 21,272,784,990 seconds is equal to 676 years, 21 weeks, 1 day, 18 hours, 56 minutes, 30 seconds.
• To count from 1 to 21,272,784,990 would take you about one thousand, three hundred fifty-two 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 21272784990 cubic inches would be around 230.9 feet tall.

Recreational maths with 21272784990

• 21272784990 backwards is 09948727212
• The number of decimal digits it has is: 11
• The sum of 21272784990's digits is 51
• More coming soon!