21687298820

Names of 21687298820

• Cardinal: 21687298820 can be written as Twenty-one billion, six hundred eighty-seven million, two hundred ninety-eight thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 2.168729882 × 10¹⁰

Factors of 21687298820

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 16117

Divisors of 21687298820

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 5 10 11 17 19 20 22 34 38 44 55 68 76 85 95 110 170 187 190 209 220 323 340 361 374 380 418 646 722 748 836 935 1045 1292 1444 1615 1805 1870 2090 3230 3553 3610 3740 3971 4180 6137 6460 7106 7220 7942 12274 14212 15884 16063 17765 19855 24548 30685 32126 35530 39710 61370 64252 67507 71060 79420 80315 122740 135014 160630 176693 270028 273071 305197 321260 337535 353386 546142 610394 675070 706772 883465 1092284 1220788 1350140 1365355 1525985 1766930 2730710 3003781 3051970 3357167 3533860 5188349 5461420 5798743 6007562 6103940 6714334 10376698 11597486 12015124 13428668 15018905 16785835 20753396 23194972 25941745 28993715 30037810 33571670 51883490 57071839 57987430 60075620 63786173 67143340 98578631 103766980 114143678 115974860 127572346 197157262 228287356 255144692 285359195 318930865 394314524 492893155 570718390 637861730 985786310 1084364941 1141436780 1275723460 1971572620 2168729882 4337459764 5421824705 10843649410 21687298820
• Sum of all divisors σ(n): 55524123648
• Sum of proper divisors (its aliquot sum) s(n): 33836824828
• 21687298820 is an abundant number, because the sum of its proper divisors (33836824828) is greater than itself. Its abundance is 12149526008

Bases of 21687298820

• Binary: 10100001100101010011110101100000100₂
• Hexadecimal: 0x50CA9EB04
• Base-36: 9YO22V8

Squares and roots of 21687298820

• 21687298820 squared (21687298820²) is 470338930107973392400
• 21687298820 cubed (21687298820³) is 10200380923930713825587916968000
• The square root of 21687298820 is 147266.0817024749
• The cube root of 21687298820 is 2788.7001571715

Scales and comparisons

• 21,687,298,820 seconds is equal to 689 years, 30 weeks, 4 days, 9 hours, 40 minutes, 20 seconds.
• To count from 1 to 21,687,298,820 would take you about one thousand, three hundred seventy-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 21687298820 cubic inches would be around 232.4 feet tall.

Recreational maths with 21687298820

• 21687298820 backwards is 02889278612
• The number of decimal digits it has is: 11
• The sum of 21687298820's digits is 53
• More coming soon!