21681644040

Names of 21681644040

• Cardinal: 21681644040 can be written as Twenty-one billion, six hundred eighty-one million, six hundred forty-four thousand and forty.

Scientific notation

• Scientific notation: 2.168164404 × 10¹⁰

Factors of 21681644040

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 10610

Divisors of 21681644040

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 18 19 20 21 24 28 30 35 36 38 40 42 43 45 56 57 60 63 70 72 76 84 86 90 95 105 114 120 126 129 133 140 152 168 171 172 180 190 210 215 228 252 258 266 280 285 301 315 342 344 360 380 387 399 420 430 456 504 516 532 570 602 630 645 665 684 760 774 798 817 840 855 860 903 1032 1064 1140 1197 1204 1260 1290 1330 1368 1505 1548 1596 1634 1710 1720 1806 1935 1995 2280 2394 2408 2451 2520 2580 2660 2709 3010 3096 3192 3268 3420 3612 3870 3990 4085 4515 4788 4902 5160 5320 5418 5719 5985 6020 6536 6840 7224 7353 7740 7980 8170 9030 9576 9804 10531 10836 11438 11970 12040 12255 13545 14706 15480 15960 16340 17157 18060 19608 21062 21672 22876 23940 24510 27090 28595 29412 31593 32680 34314 36120 36765 42124 45752 47880 49020 51471 52655 54180 57190 58824 63186 68628 73530 73717 84248 85785 94779 98040 102942 105310 108360 114380 126372 137256 147060 147434 157965 171570 189558 200089 205884 210620 221151 228760 252744 257355 294120 294868 315930 343140 368585 379116 400178 411768 421240 442302 452833 473895 514710 589736 600267 631860 663453 686280 737170 758232 800356 884604 905666 947790 1000445 1029420 1105755 1200534 1263720 1326906 1358499 1400623 1474340 1600712 1769208 1800801 1811332 1895580 2000890 2058840 2211510 2264165 2401068 2653812 2716998 2801246 2948680 3001335 3169831 3317265 3601602 3622664 3791160 4001780 4075497 4201869 4423020 4528330 4802136 5307624 5433996 5602492 6002670 6339662 6634530 6792495 7003115 7203204 8003560 8150994 8403738 8603827 8846040 9004005 9056660 9509493 10867992 11204984 12005340 12605607 12679324 13269060 13584990 14006230 14406408 15849155 16301988 16807476 17207654 18008010 18113320 19018986 20377485 21009345 24010680 25211214 25358648 25811481 26538120 27169980 28012460 28528479 31698310 32603976 33614952 34415308 36016020 38037972 40754970 42018690 43019135 47547465 50422428 51622962 54339960 56024920 57056958 60226789 63028035 63396620 68830616 72032040 76075944 77434443 81509940 84037380 86038270 95094930 100844856 103245924 114113916 120453578 126056070 126793240 129057405 142642395 154868886 163019880 168074760 172076540 180680367 190189860 206491848 228227832 240907156 252112140 258114810 285284790 301133945 309737772 344153080 361360734 380379720 387172215 481814312 504224280 516229620 542041101 570569580 602267890 619475544 722721468 774344430 903401835 1032459240 1084082202 1141139160 1204535780 1445442936 1548688860 1806803670 2168164404 2409071560 2710205505 3097377720 3613607340 4336328808 5420411010 7227214680 10840822020 21681644040
• Sum of all divisors σ(n): 86749977600
• Sum of proper divisors (its aliquot sum) s(n): 65068333560
• 21681644040 is an abundant number, because the sum of its proper divisors (65068333560) is greater than itself. Its abundance is 43386689520

Bases of 21681644040

• Binary: 10100001100010100111010001000001000₂
• Hexadecimal: 0x50C53A208
• Base-36: 9YKOVM0

Squares and roots of 21681644040

• 21681644040 squared (21681644040²) is 470093688277267521600
• 21681644040 cubed (21681644040³) is 10192404014678435227184211264000
• The square root of 21681644040 is 147246.8812572953
• The cube root of 21681644040 is 2788.4577594315

Scales and comparisons

• 21,681,644,040 seconds is equal to 689 years, 21 weeks, 1 day, 22 hours, 54 minutes.
• To count from 1 to 21,681,644,040 would take you about one thousand, three hundred seventy-eight 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 21681644040 cubic inches would be around 232.4 feet tall.

Recreational maths with 21681644040

• 21681644040 backwards is 04044618612
• 21681644040 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21681644040's digits is 36
• More coming soon!