21012797880

Names of 21012797880

• Cardinal: 21012797880 can be written as Twenty-one billion, twelve million, seven hundred ninety-seven thousand, eight hundred eighty.

Scientific notation

• Scientific notation: 2.101279788 × 10¹⁰

Factors of 21012797880

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 18014

Divisors of 21012797880

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 180 360 4241 8482 12723 13763 16964 21205 25446 27526 33928 38169 41289 42410 50892 55052 63615 68815 76338 82578 84820 101784 110104 123867 127230 137630 152676 165156 169640 190845 206445 247734 254460 275260 305352 330312 381690 412890 495468 508920 550520 619335 763380 825780 990936 1238670 1526760 1651560 2477340 4954680 58368883 116737766 175106649 233475532 291844415 350213298 466951064 525319947 583688830 700426596 875533245 1050639894 1167377660 1400853192 1751066490 2101279788 2334755320 2626599735 3502132980 4202559576 5253199470 7004265960 10506398940 21012797880
• Sum of all divisors σ(n): 68312658960
• Sum of proper divisors (its aliquot sum) s(n): 47299861080
• 21012797880 is an abundant number, because the sum of its proper divisors (47299861080) is greater than itself. Its abundance is 26287063200

Bases of 21012797880

• Binary: 10011100100011101011101100110111000₂
• Hexadecimal: 0x4E475D9B8
• Base-36: 9NIH6M0

Squares and roots of 21012797880

• 21012797880 squared (21012797880²) is 441537674745732494400
• 21012797880 cubed (21012797880³) is 9277941915837257297375431872000
• The square root of 21012797880 is 144957.9176174933
• The cube root of 21012797880 is 2759.4845130539

Scales and comparisons

• 21,012,797,880 seconds is equal to 668 years, 7 weeks, 2 days, 16 hours, 18 minutes.
• To count from 1 to 21,012,797,880 would take you about one thousand, three hundred thirty-six 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 21012797880 cubic inches would be around 230 feet tall.

Recreational maths with 21012797880

• 21012797880 backwards is 08879721012
• 21012797880 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21012797880's digits is 45
• More coming soon!