21078355968

Names of 21078355968

• Cardinal: 21078355968 can be written as Twenty-one billion, seventy-eight million, three hundred fifty-five thousand, nine hundred sixty-eight.

Scientific notation

• Scientific notation: 2.1078355968 × 10¹⁰

Factors of 21078355968

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 88

Divisors of 21078355968

• Number of divisors d(n): 156
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 32 36 48 64 72 83 96 128 144 166 192 249 256 288 332 384 498 512 576 664 747 768 996 1024 1152 1328 1494 1536 1992 2048 2304 2656 2988 3072 3984 4096 4608 5312 5976 6144 6889 7968 9216 10624 11952 12288 13778 15936 18432 20667 21248 23904 27556 31872 36864 41334 42496 47808 55112 62001 63744 82668 84992 95616 110224 124002 127488 165336 169984 191232 220448 248004 254976 330672 339968 382464 440896 496008 509952 571787 661344 764928 881792 992016 1019904 1143574 1322688 1529856 1715361 1763584 1984032 2287148 2645376 3059712 3430722 3527168 3968064 4574296 5146083 5290752 6861444 7054336 7936128 9148592 10292166 10581504 13722888 14108672 15872256 18297184 20584332 21163008 27445776 28217344 31744512 36594368 41168664 42326016 54891552 63489024 73188736 82337328 84652032 109783104 126978048 146377472 164674656 219566208 253956096 292754944 329349312 439132416 585509888 658698624 878264832 1171019776 1317397248 1756529664 2342039552 2634794496 3513059328 5269588992 7026118656 10539177984 21078355968
• Sum of all divisors σ(n): 61628101080
• Sum of proper divisors (its aliquot sum) s(n): 40549745112
• 21078355968 is an abundant number, because the sum of its proper divisors (40549745112) is greater than itself. Its abundance is 19471389144

Bases of 21078355968

• Binary: 10011101000010111100011000000000000₂
• Hexadecimal: 0x4E85E3000
• Base-36: 9OLIBK0

Squares and roots of 21078355968

• 21078355968 squared (21078355968²) is 444297090313721217024
• 21078355968 cubed (21078355968³) is 9365052225179260607146053599232
• The square root of 21078355968 is 145183.8695172435
• The cube root of 21078355968 is 2762.3513170129

Scales and comparisons

• 21,078,355,968 seconds is equal to 670 years, 11 weeks, 5 days, 10 hours, 52 minutes, 48 seconds.
• To count from 1 to 21,078,355,968 would take you about one thousand, three hundred forty 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 21078355968 cubic inches would be around 230.2 feet tall.

Recreational maths with 21078355968

• 21078355968 backwards is 86955387012
• The number of decimal digits it has is: 11
• The sum of 21078355968's digits is 54
• More coming soon!