21643487440

Names of 21643487440

• Cardinal: 21643487440 can be written as Twenty-one billion, six hundred forty-three million, four hundred eighty-seven thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.164348744 × 10¹⁰

Factors of 21643487440

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 25362

Divisors of 21643487440

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 5 8 10 16 17 20 34 37 40 68 74 80 85 136 148 170 185 272 289 296 340 370 578 592 629 680 740 1156 1258 1360 1445 1480 2312 2516 2890 2960 3145 4624 5032 5780 6290 10064 10693 11560 12580 21386 23120 25160 25301 42772 50320 50602 53465 85544 101204 106930 126505 171088 202408 213860 253010 404816 427720 430117 506020 855440 860234 936137 1012040 1720468 1872274 2024080 2150585 3440936 3744548 4301170 4680685 6881872 7311989 7489096 8602340 9361370 14623978 14978192 15914329 17204680 18722740 29247956 31828658 34409360 36559945 37445480 58495912 63657316 73119890 74890960 79571645 116991824 127314632 146239780 159143290 254629264 270543593 292479560 318286580 541087186 584959120 636573160 1082174372 1273146320 1352717965 2164348744 2705435930 4328697488 5410871860 10821743720 21643487440
• Sum of all divisors σ(n): 54902202552
• Sum of proper divisors (its aliquot sum) s(n): 33258715112
• 21643487440 is an abundant number, because the sum of its proper divisors (33258715112) is greater than itself. Its abundance is 11615227672

Bases of 21643487440

• Binary: 10100001010000011010110100011010000₂
• Hexadecimal: 0x50A0D68D0
• Base-36: 9XXZ1SG

Squares and roots of 21643487440

• 21643487440 squared (21643487440²) is 468440548565437753600
• 21643487440 cubed (21643487440³) is 10138687129262762038143414784000
• The square root of 21643487440 is 147117.2574513269
• The cube root of 21643487440 is 2786.8210363219

Scales and comparisons

• 21,643,487,440 seconds is equal to 688 years, 10 weeks, 1 day, 7 hours, 50 minutes, 40 seconds.
• To count from 1 to 21,643,487,440 would take you about one thousand, three hundred seventy-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 21643487440 cubic inches would be around 232.2 feet tall.

Recreational maths with 21643487440

• 21643487440 backwards is 04478434612
• The number of decimal digits it has is: 11
• The sum of 21643487440's digits is 43
• More coming soon!