21081784464

Names of 21081784464

• Cardinal: 21081784464 can be written as Twenty-one billion, eighty-one million, seven hundred eighty-four thousand, four hundred sixty-four.

Scientific notation

• Scientific notation: 2.1081784464 × 10¹⁰

Factors of 21081784464

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 433

Divisors of 21081784464

• Number of divisors d(n): 400
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 24 26 27 36 39 48 52 54 61 72 73 78 81 104 108 117 122 144 146 156 162 183 208 216 219 234 244 281 292 312 324 351 366 432 438 468 488 549 562 584 624 648 657 702 732 793 843 876 936 949 976 1053 1098 1124 1168 1296 1314 1404 1464 1586 1647 1686 1752 1872 1898 1971 2106 2196 2248 2379 2529 2628 2808 2847 2928 3172 3294 3372 3504 3653 3796 3942 4212 4392 4453 4496 4758 4941 5058 5256 5616 5694 5913 6344 6588 6744 7137 7306 7587 7592 7884 8424 8541 8784 8906 9516 9882 10116 10512 10959 11388 11826 12688 13176 13359 13488 14274 14612 15174 15184 15768 16848 17082 17141 17812 19032 19764 20232 20513 21411 21918 22761 22776 23652 25623 26352 26718 28548 29224 30348 31536 32877 34164 34282 35624 38064 39528 40077 40464 41026 42822 43836 45522 45552 47304 51246 51423 53436 57096 57889 58448 60696 61539 64233 65754 68328 68564 71248 76869 79056 80154 82052 85644 87672 91044 94608 98631 102492 102846 106872 114192 115778 120231 121392 123078 128466 131508 136656 137128 153738 154269 160308 164104 171288 173667 175344 182088 184617 197262 204984 205692 213744 222833 231556 240462 246156 256932 263016 266669 274256 295893 307476 308538 320616 328208 342576 347334 360693 364176 369234 394524 409968 411384 445666 462807 463112 480924 492312 513864 521001 526032 533338 553851 591786 614952 617076 641232 668499 694668 721386 738468 789048 800007 822768 891332 925614 926224 961848 984624 1027728 1042002 1066676 1107702 1183572 1229904 1234152 1251293 1336998 1388421 1389336 1442772 1476936 1563003 1578096 1600014 1661553 1782664 1851228 1923696 2005497 2084004 2133352 2215404 2367144 2400021 2468304 2502586 2673996 2776842 2778672 2885544 2953872 3126006 3200028 3323106 3565328 3702456 3753879 4010994 4168008 4266704 4430808 4689009 4734288 4800042 5005172 5347992 5553684 5771088 6016491 6252012 6400056 6646212 7200063 7404912 7507758 8021988 8336016 8861616 9378018 9600084 10010344 10695984 11107368 11261637 12032982 12504024 12800112 13292424 14400126 15015516 16043976 16266809 18049473 18756036 19200168 20020688 21600189 22214736 22523274 24065964 25008048 26584848 28800252 30031032 32087952 32533618 33784911 36098946 37512072 38400336 43200378 45046548 48131928 48800427 57600504 60062064 65067236 67569822 72197892 75024144 86400756 90093096 96263856 97600854 101354733 115201008 130134472 135139644 144395784 146401281 172801512 180186192 195201708 202709466 260268944 270279288 288791568 292802562 345603024 390403416 405418932 439203843 540558576 585605124 780806832 810837864 878407686 1171210248 1317611529 1621675728 1756815372 2342420496 2635223058 3513630744 5270446116 7027261488 10540892232 21081784464
• Sum of all divisors σ(n): 67943453424
• Sum of proper divisors (its aliquot sum) s(n): 46861668960
• 21081784464 is an abundant number, because the sum of its proper divisors (46861668960) is greater than itself. Its abundance is 25779884496

Bases of 21081784464

• Binary: 10011101000100100101000000010010000₂
• Hexadecimal: 0x4E8928090
• Base-36: 9ONJT00

Squares and roots of 21081784464

• 21081784464 squared (21081784464²) is 444441636186551767296
• 21081784464 cubed (21081784464³) is 9369622780912387253512556089344
• The square root of 21081784464 is 145195.6764645559
• The cube root of 21081784464 is 2762.5010788035

Scales and comparisons

• 21,081,784,464 seconds is equal to 670 years, 17 weeks, 3 days, 3 hours, 14 minutes, 24 seconds.
• To count from 1 to 21,081,784,464 would take you about one thousand, three hundred forty 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 21081784464 cubic inches would be around 230.2 feet tall.

Recreational maths with 21081784464

• 21081784464 backwards is 46448718012
• The number of decimal digits it has is: 11
• The sum of 21081784464's digits is 45
• More coming soon!