21385510020

Names of 21385510020

• Cardinal: 21385510020 can be written as Twenty-one billion, three hundred eighty-five million, five hundred ten thousand and twenty.

Scientific notation

• Scientific notation: 2.138551002 × 10¹⁰

Factors of 21385510020

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 83655

Divisors of 21385510020

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 28 29 30 35 36 42 45 49 58 60 63 70 84 87 90 98 105 116 126 140 145 147 174 180 196 203 210 245 252 261 290 294 315 348 406 420 435 441 490 522 580 588 609 630 735 812 870 882 980 1015 1044 1218 1260 1305 1421 1470 1740 1764 1827 2030 2205 2436 2610 2842 2940 3045 3654 4060 4263 4410 5220 5684 6090 7105 7308 8526 8820 9135 12180 12789 14210 17052 18270 21315 25578 28420 36540 42630 51156 63945 83609 85260 127890 167218 250827 255780 334436 418045 501654 585263 752481 836090 1003308 1170526 1254135 1504962 1672180 1755789 2341052 2424661 2508270 2926315 3009924 3511578 3762405 4096841 4849322 5016540 5267367 5852630 7023156 7273983 7524810 8193682 8778945 9698644 10534734 11705260 12123305 12290523 14547966 15049620 16387364 16972627 17557890 20484205 21069468 21821949 24246610 24581046 26336835 29095932 33945254 35115780 36369915 36871569 40968410 43643898 48493220 49162092 50917881 52673670 61452615 67890508 72739830 73743138 81936820 84863135 87287796 101835762 105347340 109109745 118808389 122905230 145479660 147486276 152753643 169726270 184357845 203671524 218219490 237616778 245810460 254589405 305507286 339452540 356425167 368715690 436438980 475233556 509178810 594041945 611014572 712850334 737431380 763768215 1018357620 1069275501 1188083890 1425700668 1527536430 1782125835 2138551002 2376167780 3055072860 3564251670 4277102004 5346377505 7128503340 10692755010 21385510020
• Sum of all divisors σ(n): 78063312600
• Sum of proper divisors (its aliquot sum) s(n): 56677802580
• 21385510020 is an abundant number, because the sum of its proper divisors (56677802580) is greater than itself. Its abundance is 35292292560

Bases of 21385510020

• Binary: 10011111010101011001111110010000100₂
• Hexadecimal: 0x4FAACFC84
• Base-36: 9TODP50

Squares and roots of 21385510020

• 21385510020 squared (21385510020²) is 457340038815520400400
• 21385510020 cubed (21385510020³) is 9780449982636500454268612008000
• The square root of 21385510020 is 146237.8542648927
• The cube root of 21385510020 is 2775.7043374051

Scales and comparisons

• 21,385,510,020 seconds is equal to 679 years, 51 weeks, 4 days, 11 hours, 27 minutes.
• To count from 1 to 21,385,510,020 would take you about one thousand, three hundred fifty-nine 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 21385510020 cubic inches would be around 231.3 feet tall.

Recreational maths with 21385510020

• 21385510020 backwards is 02001558312
• The number of decimal digits it has is: 11
• The sum of 21385510020's digits is 27
• More coming soon!