21445997408

Names of 21445997408

• Cardinal: 21445997408 can be written as Twenty-one billion, four hundred forty-five million, nine hundred ninety-seven thousand, four hundred eight.

Scientific notation

• Scientific notation: 2.1445997408 × 10¹⁰

Factors of 21445997408

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 235

Divisors of 21445997408

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 4 8 11 16 22 29 31 32 44 58 61 62 88 101 116 121 122 124 176 202 232 242 244 248 319 341 352 404 464 484 488 496 638 671 682 808 899 928 968 976 992 1111 1276 1342 1364 1616 1769 1798 1891 1936 1952 2222 2552 2684 2728 2929 3131 3232 3509 3538 3596 3751 3782 3872 4444 5104 5368 5456 5858 6161 6262 7018 7076 7192 7381 7502 7564 8888 9889 10208 10736 10912 11716 12221 12322 12524 14036 14152 14384 14762 15004 15128 17776 19459 19778 20801 21472 23432 24442 24644 25048 28072 28304 28768 29524 30008 30256 32219 34441 35552 38918 39556 41602 46864 48884 49288 50096 54839 56144 56608 59048 60016 60512 64438 67771 68882 77836 79112 83204 90799 93728 97768 98576 100192 108779 109678 112288 118096 120032 128876 135542 137764 155672 158224 166408 178669 181598 190991 195536 197152 214049 217558 219356 228811 236192 257752 271084 275528 311344 316448 332816 354409 357338 363196 378851 381982 391072 428098 435116 438712 457622 515504 542168 551056 603229 622688 665632 708818 714676 726392 745481 757702 763964 856196 870232 877424 915244 998789 1031008 1084336 1102112 1206458 1417636 1429352 1452784 1490962 1515404 1527928 1712392 1740464 1754848 1830488 1965359 1997578 2100901 2168672 2412916 2835272 2858704 2905568 2981924 3030808 3055856 3424784 3480928 3660976 3930718 3995156 4201802 4825832 5538739 5670544 5717408 5963848 6061616 6111712 6635519 6849568 7321952 7861436 7990312 8403604 9651664 10986679 11077478 11341088 11927696 12123232 13271038 15722872 15980624 16807208 19303328 21618949 21973358 22154956 23109911 23855392 26542076 31445744 31961248 33614416 43237898 43946716 44309912 46219822 53084152 60926129 62891488 67228832 86475796 87893432 88619824 92439644 106168304 121852258 172951592 175786864 177239648 184879288 212336608 243704516 345903184 351573728 369758576 487409032 670187419 691806368 739517152 974818064 1340374838 1949636128 2680749676 5361499352 10722998704 21445997408
• Sum of all divisors σ(n): 50869244160
• Sum of proper divisors (its aliquot sum) s(n): 29423246752
• 21445997408 is an abundant number, because the sum of its proper divisors (29423246752) is greater than itself. Its abundance is 7977249344

Bases of 21445997408

• Binary: 10011111110010001111111001101100000₂
• Hexadecimal: 0x4FE47F360
• Base-36: 9UOE5I8

Squares and roots of 21445997408

• 21445997408 squared (21445997408²) is 459930804823942718464
• 21445997408 cubed (21445997408³) is 9863674848113629436519417741312
• The square root of 21445997408 is 146444.5198974683
• The cube root of 21445997408 is 2778.3188344831

Scales and comparisons

• 21,445,997,408 seconds is equal to 681 years, 47 weeks, 4 days, 13 hours, 30 minutes, 8 seconds.
• To count from 1 to 21,445,997,408 would take you about one thousand, three hundred sixty-three 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 21445997408 cubic inches would be around 231.5 feet tall.

Recreational maths with 21445997408

• 21445997408 backwards is 80479954412
• The number of decimal digits it has is: 11
• The sum of 21445997408's digits is 53
• More coming soon!