21118474720

Names of 21118474720

• Cardinal: 21118474720 can be written as Twenty-one billion, one hundred eighteen million, four hundred seventy-four thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.111847472 × 10¹⁰

Factors of 21118474720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 2848

Divisors of 21118474720

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 31 32 35 40 49 56 62 70 80 98 112 124 140 155 160 196 217 224 245 248 280 310 392 434 490 496 560 620 784 868 961 980 992 1085 1120 1240 1519 1568 1736 1922 1960 2170 2480 2803 3038 3472 3844 3920 4340 4805 4960 5606 6076 6727 6944 7595 7688 7840 8680 9610 11212 12152 13454 14015 15190 15376 17360 19220 19621 22424 24304 26908 28030 30380 30752 33635 34720 38440 39242 44848 47089 48608 53816 56060 60760 67270 76880 78484 86893 89696 94178 98105 107632 112120 121520 134540 137347 153760 156968 173786 188356 196210 215264 224240 235445 243040 269080 274694 313936 347572 376712 392420 434465 448480 470890 538160 549388 608251 627872 686735 695144 753424 784840 868930 941780 1076320 1098776 1216502 1373470 1390288 1506848 1569680 1737860 1883560 2197552 2433004 2693683 2746940 2780576 3041255 3139360 3475720 3767120 4257757 4395104 4866008 5387366 5493880 6082510 6951440 7534240 8515514 9732016 10774732 10987760 12165020 13468415 13902880 17031028 18855781 19464032 21288785 21549464 21975520 24330040 26936830 34062056 37711562 42577570 43098928 48660080 53873660 68124112 75423124 85155140 86197856 94278905 97320160 107747320 131990467 136248224 150846248 170310280 188557810 215494640 263980934 301692496 340620560 377115620 430989280 527961868 603384992 659952335 681241120 754231240 1055923736 1319904670 1508462480 2111847472 2639809340 3016924960 4223694944 5279618680 10559237360 21118474720
• Sum of all divisors σ(n): 59992079112
• Sum of proper divisors (its aliquot sum) s(n): 38873604392
• 21118474720 is an abundant number, because the sum of its proper divisors (38873604392) is greater than itself. Its abundance is 17755129672

Bases of 21118474720

• Binary: 10011101010110000100101100111100000₂
• Hexadecimal: 0x4EAC259E0
• Base-36: 9P9E7DS

Squares and roots of 21118474720

• 21118474720 squared (21118474720²) is 445989974499279078400
• 21118474720 cubed (21118474720³) is 9418628001836469875415298048000
• The square root of 21118474720 is 145321.9691581421
• The cube root of 21118474720 is 2764.1027479129

Scales and comparisons

• 21,118,474,720 seconds is equal to 671 years, 26 weeks, 18 hours, 58 minutes, 40 seconds.
• To count from 1 to 21,118,474,720 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 21118474720 cubic inches would be around 230.3 feet tall.

Recreational maths with 21118474720

• 21118474720 backwards is 02747481112
• The number of decimal digits it has is: 11
• The sum of 21118474720's digits is 37
• More coming soon!