21820894380

Names of 21820894380

• Cardinal: 21820894380 can be written as Twenty-one billion, eight hundred twenty million, eight hundred ninety-four thousand, three hundred eighty.

Scientific notation

• Scientific notation: 2.182089438 × 10¹⁰

Factors of 21820894380

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 636

Divisors of 21820894380

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 30 36 43 45 60 61 86 90 113 122 129 172 180 183 215 226 244 258 305 339 366 387 409 430 452 516 549 565 610 645 678 732 774 818 860 915 1017 1098 1130 1220 1227 1290 1356 1548 1636 1695 1830 1935 2034 2045 2196 2260 2454 2580 2623 2745 3390 3660 3681 3870 4068 4090 4859 4908 5085 5246 5490 6135 6780 6893 7362 7740 7869 8180 9718 10170 10492 10980 12270 13115 13786 14577 14724 15738 17587 18405 19436 20340 20679 23607 24295 24540 24949 26230 27572 29154 31476 34465 35174 36810 39345 41358 43731 46217 47214 48590 49898 52460 52761 58308 62037 68930 70348 72885 73620 74847 78690 82716 87462 87935 92434 94428 97180 99796 103395 105522 118035 124074 124745 137860 138651 145770 149694 157380 158283 174924 175870 184868 206790 211044 218655 224541 231085 236070 248148 249490 263805 277302 291540 296399 299388 310185 316566 351740 374235 413580 415953 437310 449082 462170 472140 498980 527610 554604 592798 620370 633132 693255 748470 791415 831906 874620 889197 898164 924340 1055220 1072807 1122705 1185596 1240740 1386510 1481995 1496940 1582830 1663812 1778394 1987331 2079765 2145614 2245410 2667591 2773020 2819237 2963990 3165660 3218421 3556788 3974662 4159530 4291228 4445985 4490820 5335182 5364035 5638474 5927980 5961993 6436842 7949324 8319060 8457711 8891970 9655263 9936655 10670364 10728070 11276948 11923986 12873684 13337955 14096185 16092105 16915422 17783940 17885979 19310526 19873310 21456140 23847972 25373133 26675910 28192370 29809965 32184210 33830844 35771958 38621052 39746620 42288555 48276315 50746266 53351820 56384740 59619930 64368420 71543916 84577110 89429895 96552630 101492532 119239860 121227191 126865665 169154220 178859790 193105260 242454382 253731330 357719580 363681573 484908764 507462660 606135955 727363146 1091044719 1212271910 1454726292 1818407865 2182089438 2424543820 3636815730 4364178876 5455223595 7273631460 10910447190 21820894380
• Sum of all divisors σ(n): 69618669120
• Sum of proper divisors (its aliquot sum) s(n): 47797774740
• 21820894380 is an abundant number, because the sum of its proper divisors (47797774740) is greater than itself. Its abundance is 25976880360

Bases of 21820894380

• Binary: 10100010100101000000110110010101100₂
• Hexadecimal: 0x514A06CAC
• Base-36: A0VLHV0

Squares and roots of 21820894380

• 21820894380 squared (21820894380²) is 476151431543115584400
• 21820894380 cubed (21820894380³) is 10390050096588125583324375672000
• The square root of 21820894380 is 147718.9709549861
• The cube root of 21820894380 is 2794.4146473839

Scales and comparisons

• 21,820,894,380 seconds is equal to 693 years, 43 weeks, 3 days, 15 hours, 33 minutes.
• To count from 1 to 21,820,894,380 would take you about one thousand, three hundred eighty-seven 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 21820894380 cubic inches would be around 232.9 feet tall.

Recreational maths with 21820894380

• 21820894380 backwards is 08349802812
• 21820894380 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21820894380's digits is 45
• More coming soon!