21688457440

Names of 21688457440

• Cardinal: 21688457440 can be written as Twenty-one billion, six hundred eighty-eight million, four hundred fifty-seven thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.168845744 × 10¹⁰

Factors of 21688457440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 8297

Divisors of 21688457440

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 4 5 8 10 13 16 19 20 26 32 38 40 52 65 67 76 80 95 104 130 134 152 160 190 208 247 260 268 304 335 380 416 494 520 536 608 670 760 871 988 1040 1072 1235 1273 1340 1520 1742 1976 2080 2144 2470 2546 2680 3040 3484 3952 4355 4940 5092 5360 6365 6968 7904 8191 8710 9880 10184 10720 12730 13936 16382 16549 17420 19760 20368 25460 27872 32764 33098 34840 39520 40736 40955 50920 65528 66196 69680 81910 82745 101840 106483 131056 132392 139360 155629 163820 165490 203680 212966 262112 264784 311258 327640 330980 425932 529568 532415 548797 622516 655280 661960 778145 851864 1064830 1097594 1245032 1310560 1323920 1556290 1703728 2023177 2129660 2195188 2490064 2647840 2743985 3112580 3407456 4046354 4259320 4390376 4980128 5487970 6225160 7134361 8092708 8518640 8780752 10115885 10427143 10975940 12450320 14268722 16185416 17037280 17561504 20231770 20854286 21951880 24900640 28537444 32370832 35671805 40463540 41708572 43903760 52135715 57074888 64741664 71343610 80927080 83417144 87807520 104271430 114149776 135552859 142687220 161854160 166834288 208542860 228299552 271105718 285374440 323708320 333668576 417085720 542211436 570748880 677764295 834171440 1084422872 1141497760 1355528590 1668342880 2168845744 2711057180 4337691488 5422114360 10844228720 21688457440
• Sum of all divisors σ(n): 58958807040
• Sum of proper divisors (its aliquot sum) s(n): 37270349600
• 21688457440 is an abundant number, because the sum of its proper divisors (37270349600) is greater than itself. Its abundance is 15581892160

Bases of 21688457440

• Binary: 10100001100101110111001100011100000₂
• Hexadecimal: 0x50CBB98E0
• Base-36: 9YOQWV4

Squares and roots of 21688457440

• 21688457440 squared (21688457440²) is 470389186126691353600
• 21688457440 cubed (21688457440³) is 10202015843544983870569590784000
• The square root of 21688457440 is 147270.0154138649
• The cube root of 21688457440 is 2788.7498173631

Scales and comparisons

• 21,688,457,440 seconds is equal to 689 years, 32 weeks, 3 days, 19 hours, 30 minutes, 40 seconds.
• To count from 1 to 21,688,457,440 would take you about one thousand, three hundred seventy-nine 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 21688457440 cubic inches would be around 232.4 feet tall.

Recreational maths with 21688457440

• 21688457440 backwards is 04475488612
• The number of decimal digits it has is: 11
• The sum of 21688457440's digits is 49
• More coming soon!