21218766804

Names of 21218766804

• Cardinal: 21218766804 can be written as Twenty-one billion, two hundred eighteen million, seven hundred sixty-six thousand, eight hundred four.

Scientific notation

• Scientific notation: 2.1218766804 × 10¹⁰

Factors of 21218766804

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1693

Divisors of 21218766804

• Number of divisors d(n): 126
• Complete list of divisors:
  1 2 3 4 6 9 12 18 27 36 54 67 81 108 134 162 201 243 268 324 402 486 603 729 804 972 1206 1458 1621 1809 2412 2916 3242 3618 4489 4863 5427 6484 7236 8978 9726 10854 13467 14589 16281 17956 19452 21708 26934 29178 32562 40401 43767 48843 53868 58356 65124 80802 87534 97686 108607 121203 131301 161604 175068 195372 217214 242406 262602 325821 363609 393903 434428 484812 525204 651642 727218 787806 977463 1090827 1181709 1303284 1454436 1575612 1954926 2181654 2363418 2932389 3272481 3909852 4363308 4726836 5864778 6544962 7276669 8797167 11729556 13089924 14553338 17594334 21830007 26391501 29106676 35188668 43660014 52783002 65490021 79174503 87320028 105566004 130980042 158349006 196470063 261960084 316698012 392940126 589410189 785880252 1178820378 1768230567 2357640756 3536461134 5304691701 7072922268 10609383402 21218766804
• Sum of all divisors σ(n): 56552014554
• Sum of proper divisors (its aliquot sum) s(n): 35333247750
• 21218766804 is an abundant number, because the sum of its proper divisors (35333247750) is greater than itself. Its abundance is 14114480946

Bases of 21218766804

• Binary: 10011110000101111001010111111010100₂
• Hexadecimal: 0x4F0BCAFD4
• Base-36: 9QX3T90

Squares and roots of 21218766804

• 21218766804 squared (21218766804²) is 450236064682532374416
• 21218766804 cubed (21218766804³) is 9553454063249314744913519686464
• The square root of 21218766804 is 145666.6289992323
• The cube root of 21218766804 is 2768.4714337097

Scales and comparisons

• 21,218,766,804 seconds is equal to 674 years, 35 weeks, 6 days, 13 hours, 53 minutes, 24 seconds.
• To count from 1 to 21,218,766,804 would take you about one thousand, three hundred forty-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 21218766804 cubic inches would be around 230.7 feet tall.

Recreational maths with 21218766804

• 21218766804 backwards is 40866781212
• The number of decimal digits it has is: 11
• The sum of 21218766804's digits is 45
• More coming soon!