21358981680

Names of 21358981680

• Cardinal: 21358981680 can be written as Twenty-one billion, three hundred fifty-eight million, nine hundred eighty-one thousand, six hundred eighty.

Scientific notation

• Scientific notation: 2.135898168 × 10¹⁰

Factors of 21358981680

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 2493

Divisors of 21358981680

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 179 240 241 358 482 537 716 723 895 964 1074 1205 1432 1446 1790 1928 2063 2148 2410 2685 2864 2892 3580 3615 3856 4126 4296 4820 5370 5784 6189 7160 7230 8252 8592 9640 10315 10740 11568 12378 14320 14460 16504 19280 20630 21480 24756 28920 30945 33008 41260 42960 43139 49512 57840 61890 82520 86278 99024 123780 129417 165040 172556 215695 247560 258834 345112 369277 431390 495120 497183 517668 647085 690224 738554 862780 994366 1035336 1107831 1294170 1477108 1491549 1725560 1846385 1988732 2070672 2215662 2485915 2588340 2954216 2983098 3451120 3692770 3977464 4431324 4971830 5176680 5539155 5908432 5966196 7385540 7457745 7954928 8862648 9943660 10353360 11078310 11932392 14771080 14915490 17725296 19887320 22156620 23864784 29542160 29830980 39774640 44313240 59661960 88626480 88995757 119323920 177991514 266987271 355983028 444978785 533974542 711966056 889957570 1067949084 1334936355 1423932112 1779915140 2135898168 2669872710 3559830280 4271796336 5339745420 7119660560 10679490840 21358981680
• Sum of all divisors σ(n): 66891432960
• Sum of proper divisors (its aliquot sum) s(n): 45532451280
• 21358981680 is an abundant number, because the sum of its proper divisors (45532451280) is greater than itself. Its abundance is 24173469600

Bases of 21358981680

• Binary: 10011111001000110000011001000110000₂
• Hexadecimal: 0x4F9183230
• Base-36: 9T8L3QO

Squares and roots of 21358981680

• 21358981680 squared (21358981680²) is 456206098406575622400
• 21358981680 cubed (21358981680³) is 9744097698170325910376197632000
• The square root of 21358981680 is 146147.1234065179
• The cube root of 21358981680 is 2774.5561254165

Scales and comparisons

• 21,358,981,680 seconds is equal to 679 years, 7 weeks, 5 days, 10 hours, 28 minutes.
• To count from 1 to 21,358,981,680 would take you about one thousand, three hundred fifty-eight 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 21358981680 cubic inches would be around 231.2 feet tall.

Recreational maths with 21358981680

• 21358981680 backwards is 08618985312
• The number of decimal digits it has is: 11
• The sum of 21358981680's digits is 51
• More coming soon!