21087824828

Names of 21087824828

• Cardinal: 21087824828 can be written as Twenty-one billion, eighty-seven million, eight hundred twenty-four thousand, eight hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1087824828 × 10¹⁰

Factors of 21087824828

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 162

Divisors of 21087824828

• Number of divisors d(n): 162
• Complete list of divisors:
  1 2 4 7 14 17 28 34 47 49 68 89 94 98 119 178 188 196 238 289 329 356 476 578 623 658 799 833 1156 1246 1316 1513 1598 1666 2023 2303 2492 3026 3196 3332 4046 4183 4361 4606 5593 6052 7921 8092 8366 8722 9212 10591 11186 13583 14161 15842 16732 17444 21182 22372 25721 27166 28322 29281 31684 39151 42364 51442 54332 55447 56644 58562 71111 74137 78302 95081 102884 110894 117124 134657 142222 148274 156604 180047 190162 204967 221788 269314 284444 296548 360094 372287 380324 388129 409934 497777 538628 665567 720188 744574 776258 819868 942599 995554 1208887 1260329 1331134 1489148 1552516 1885198 1991108 2289169 2417774 2520658 2606009 2662268 3484439 3770396 4578338 4835548 5041316 5212018 6328879 6598193 6968878 8462209 9156676 10424036 12657758 13196386 13937756 16024183 16924418 18242063 25315516 26392772 32048366 33848836 36484126 44302153 59235463 64096732 72968252 88604306 107590943 112169281 118470926 177208612 215181886 224338562 236941852 310115071 430363772 448677124 620230142 753136601 1240460284 1506273202 3012546404 5271956207 10543912414 21087824828
• Sum of all divisors σ(n): 47101988304
• Sum of proper divisors (its aliquot sum) s(n): 26014163476
• 21087824828 is an abundant number, because the sum of its proper divisors (26014163476) is greater than itself. Its abundance is 4926338648

Bases of 21087824828

• Binary: 10011101000111011101010101110111100₂
• Hexadecimal: 0x4E8EEABBC
• Base-36: 9OR59RW

Squares and roots of 21087824828

• 21087824828 squared (21087824828²) is 444696355976413229584
• 21087824828 cubed (21087824828³) is 9377678856480533085209139311552
• The square root of 21087824828 is 145216.4757456949
• The cube root of 21087824828 is 2762.7648913645

Scales and comparisons

• 21,087,824,828 seconds is equal to 670 years, 27 weeks, 3 days, 1 hour, 7 minutes, 8 seconds.
• To count from 1 to 21,087,824,828 would take you about one thousand, three hundred forty-one 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 21087824828 cubic inches would be around 230.2 feet tall.

Recreational maths with 21087824828

• 21087824828 backwards is 82842878012
• The number of decimal digits it has is: 11
• The sum of 21087824828's digits is 50
• More coming soon!