21121838640

Names of 21121838640

• Cardinal: 21121838640 can be written as Twenty-one billion, one hundred twenty-one million, eight hundred thirty-eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.112183864 × 10¹⁰

Factors of 21121838640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 465666

Divisors of 21121838640

• Number of divisors d(n): 200
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 35 36 40 42 45 48 54 56 60 63 70 72 80 81 84 90 105 108 112 120 126 135 140 144 162 168 180 189 210 216 240 252 270 280 315 324 336 360 378 405 420 432 504 540 560 567 630 648 720 756 810 840 945 1008 1080 1134 1260 1296 1512 1620 1680 1890 2160 2268 2520 2835 3024 3240 3780 4536 5040 5670 6480 7560 9072 11340 15120 22680 45360 465649 931298 1396947 1862596 2328245 2793894 3259543 3725192 4190841 4656490 5587788 6519086 6984735 7450384 8381682 9312980 9778629 11175576 12572523 13038172 13969470 16297715 16763364 18625960 19557258 20954205 22351152 25145046 26076344 27938940 29335887 32595430 33526728 37251920 37717569 39114516 41908410 48893145 50290092 52152688 55877880 58671774 62862615 65190860 67053456 75435138 78229032 83816820 88007661 97786290 100580184 111755760 117343548 125725230 130381720 146679435 150870276 156458064 167633640 176015322 188587845 195572580 201160368 234687096 251450460 260763440 264022983 293358870 301740552 335267280 352030644 377175690 391145160 440038305 469374192 502900920 528045966 586717740 603481104 704061288 754351380 782290320 880076610 1005801840 1056091932 1173435480 1320114915 1408122576 1508702760 1760153220 2112183864 2346870960 2640229830 3017405520 3520306440 4224367728 5280459660 7040612880 10560919320 21121838640
• Sum of all divisors σ(n): 83839351200
• Sum of proper divisors (its aliquot sum) s(n): 62717512560
• 21121838640 is an abundant number, because the sum of its proper divisors (62717512560) is greater than itself. Its abundance is 41595673920

Bases of 21121838640

• Binary: 10011101010111101011010111000110000₂
• Hexadecimal: 0x4EAF5AE30
• Base-36: 9PBEB00

Squares and roots of 21121838640

• 21121838640 squared (21121838640²) is 446132067534197049600
• 21121838640 cubed (21121838640³) is 9423129542586892763615276544000
• The square root of 21121838640 is 145333.5427215619
• The cube root of 21121838640 is 2764.2495029381

Scales and comparisons

• 21,121,838,640 seconds is equal to 671 years, 31 weeks, 4 days, 17 hours, 24 minutes.
• To count from 1 to 21,121,838,640 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 21121838640 cubic inches would be around 230.4 feet tall.

Recreational maths with 21121838640

• 21121838640 backwards is 04683812112
• 21121838640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21121838640's digits is 36
• More coming soon!