21729435728

Names of 21729435728

• Cardinal: 21729435728 can be written as Twenty-one billion, seven hundred twenty-nine million, four hundred thirty-five thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1729435728 × 10¹⁰

Factors of 21729435728

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 153

Divisors of 21729435728

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 4 7 8 11 13 14 16 19 22 26 28 38 44 49 52 56 76 77 88 91 98 101 104 112 133 143 152 154 176 182 196 202 208 209 247 266 286 304 308 364 392 404 418 494 532 539 572 616 637 707 728 784 808 836 931 988 1001 1064 1078 1111 1144 1232 1274 1313 1414 1456 1463 1616 1672 1729 1862 1919 1976 2002 2128 2156 2222 2288 2548 2626 2717 2828 2926 3344 3458 3724 3838 3952 4004 4312 4444 4949 5096 5252 5434 5656 5852 6916 7007 7448 7676 7777 8008 8624 8888 9191 9898 10192 10201 10241 10504 10868 11312 11704 12103 13433 13832 14014 14443 14896 15352 15554 16016 17776 18382 19019 19796 20402 20482 21008 21109 21736 23408 24206 24947 26866 27664 28028 28886 30704 31108 36764 38038 39592 40804 40964 42218 43472 48412 49894 53732 54439 56056 57772 62216 64337 71407 73528 76076 79184 81608 81928 84436 94031 96824 99788 101101 107464 108878 112112 112211 115544 124432 128674 132613 133133 142814 147056 147763 152152 163216 163856 168872 174629 188062 193648 193819 199576 202202 214928 217756 224422 231088 257348 265226 266266 274417 285628 295526 304304 337744 349258 376124 387638 399152 404404 435512 448844 499849 514696 530452 532532 548834 571256 591052 698516 707707 752248 775276 785477 808808 871024 897688 928291 999698 1029392 1034341 1060904 1065064 1097668 1142512 1182104 1222403 1356733 1397032 1415414 1458743 1504496 1550552 1570954 1617616 1795376 1856582 1920919 1999396 2068682 2121808 2130128 2132009 2195336 2364208 2444806 2519647 2713466 2794064 2830828 2917486 3101104 3141908 3713164 3841838 3998792 4137364 4264018 4390672 4889612 5039294 5426932 5498339 5661656 5834972 6283816 6498037 7426328 7683676 7997584 8274728 8528036 9497131 9779224 10078588 10211201 10853864 10996678 11323312 11669944 12567632 12996074 13446433 14852656 14924063 15367352 16549456 17056072 17637529 18994262 19558448 20157176 20422402 21707728 21993356 23339888 25992148 26892866 27716117 29848126 30734704 34112144 35275058 37988524 40314352 40844804 43986712 51984296 53785732 55432234 59696252 70550116 71478407 75977048 81689608 87973424 103968592 104468441 107571464 110864468 119392504 123462703 141100232 142956814 151954096 163379216 194012819 208936882 215142928 221728936 238785008 246925406 282200464 285913628 388025638 417873764 443457872 493850812 571827256 776051276 835747528 987701624 1143654512 1358089733 1552102552 1671495056 1975403248 2716179466 3104205104 5432358932 10864717864 21729435728
• Sum of all divisors σ(n): 61170147360
• Sum of proper divisors (its aliquot sum) s(n): 39440711632
• 21729435728 is an abundant number, because the sum of its proper divisors (39440711632) is greater than itself. Its abundance is 17711275904

Bases of 21729435728

• Binary: 10100001111001011001110000001010000₂
• Hexadecimal: 0x50F2CE050
• Base-36: 9ZD57WW

Squares and roots of 21729435728

• 21729435728 squared (21729435728²) is 472168377057282889984
• 21729435728 cubed (21729435728³) is 10259952402060298332221422948352
• The square root of 21729435728 is 147409.0761384795
• The cube root of 21729435728 is 2790.5050719931

Scales and comparisons

• 21,729,435,728 seconds is equal to 690 years, 48 weeks, 2 days, 2 hours, 22 minutes, 8 seconds.
• To count from 1 to 21,729,435,728 would take you about one thousand, three hundred eighty-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 21729435728 cubic inches would be around 232.5 feet tall.

Recreational maths with 21729435728

• 21729435728 backwards is 82753492712
• The number of decimal digits it has is: 11
• The sum of 21729435728's digits is 50
• More coming soon!