21428543664

Names of 21428543664

• Cardinal: 21428543664 can be written as Twenty-one billion, four hundred twenty-eight million, five hundred forty-three thousand, six hundred sixty-four.

Scientific notation

• Scientific notation: 2.1428543664 × 10¹⁰

Factors of 21428543664

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 2639

Divisors of 21428543664

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 22 24 31 33 36 44 48 62 66 72 88 93 99 124 132 144 176 181 186 198 248 264 279 341 362 372 396 496 528 543 558 682 724 744 792 1023 1086 1116 1364 1448 1488 1584 1629 1991 2046 2172 2232 2411 2728 2896 3069 3258 3982 4092 4344 4464 4822 5456 5611 5973 6138 6516 7233 7964 8184 8688 9644 11222 11946 12276 13032 14466 15928 16368 16833 17919 19288 21699 22444 23892 24552 26064 26521 28932 31856 33666 35838 38576 43398 44888 47784 49104 50499 53042 57864 61721 67332 71676 74741 79563 86796 89776 95568 100998 106084 115728 123442 134664 143352 149482 159126 173592 185163 201996 212168 224223 238689 246884 269328 286704 298964 318252 347184 370326 403992 424336 436391 448446 477378 493768 555489 597928 636504 672669 740652 807984 822151 872782 896892 954756 987536 1110978 1195856 1273008 1309173 1345338 1481304 1644302 1745564 1793784 1909512 2221956 2466453 2618346 2690676 2962608 3288604 3491128 3587568 3819024 3927519 4443912 4800301 4932906 5236692 5381352 6577208 6982256 7399359 7855038 8887824 9600602 9865812 10473384 10762704 13154416 13528121 14400903 14798718 15710076 19201204 19731624 20946768 27056242 28801806 29597436 31420152 38402408 39463248 40584363 43202709 54112484 57603612 59194872 62840304 76804816 81168726 86405418 108224968 115207224 118389744 121753089 148809331 162337452 172810836 216449936 230414448 243506178 297618662 324674904 345621672 446427993 487012356 595237324 649349808 691243344 892855986 974024712 1190474648 1339283979 1785711972 1948049424 2380949296 2678567958 3571423944 5357135916 7142847888 10714271832 21428543664
• Sum of all divisors σ(n): 67933651968
• Sum of proper divisors (its aliquot sum) s(n): 46505108304
• 21428543664 is an abundant number, because the sum of its proper divisors (46505108304) is greater than itself. Its abundance is 25076564640

Bases of 21428543664

• Binary: 10011111101001111011010000010110000₂
• Hexadecimal: 0x4FD3DA0B0
• Base-36: 9UE0240

Squares and roots of 21428543664

• 21428543664 squared (21428543664²) is 459182483559954544896
• 21428543664 cubed (21428543664³) is 9839611898708448127159184338944
• The square root of 21428543664 is 146384.9161081835
• The cube root of 21428543664 is 2777.5649218263

Scales and comparisons

• 21,428,543,664 seconds is equal to 681 years, 18 weeks, 5 days, 13 hours, 14 minutes, 24 seconds.
• To count from 1 to 21,428,543,664 would take you about one thousand, three hundred sixty-two 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 21428543664 cubic inches would be around 231.5 feet tall.

Recreational maths with 21428543664

• 21428543664 backwards is 46634582412
• The number of decimal digits it has is: 11
• The sum of 21428543664's digits is 45
• More coming soon!