21256401408

Names of 21256401408

• Cardinal: 21256401408 can be written as Twenty-one billion, two hundred fifty-six million, four hundred one thousand, four hundred eight.

Scientific notation

• Scientific notation: 2.1256401408 × 10¹⁰

Factors of 21256401408

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 40630

Divisors of 21256401408

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 6 8 11 12 16 22 24 31 32 33 44 48 62 64 66 88 93 96 124 128 132 176 186 192 248 256 264 341 352 372 384 496 512 528 682 704 744 768 992 1023 1056 1364 1408 1488 1536 1984 2046 2112 2728 2816 2976 3968 4092 4224 5456 5632 5952 7936 8184 8448 10912 11904 15872 16368 16896 21824 23808 32736 40583 43648 47616 65472 81166 87296 121749 130944 162332 174592 243498 261888 324664 446413 486996 523776 649328 892826 973992 1258073 1298656 1339239 1785652 1947984 2516146 2597312 2678478 3571304 3774219 3895968 5032292 5194624 5356956 7142608 7548438 7791936 10064584 10389248 10713912 13838803 14285216 15096876 15583872 20129168 20778496 21427824 27677606 28570432 30193752 31167744 40258336 41516409 42855648 55355212 57140864 60387504 62335488 80516672 83032818 85711296 110710424 114281728 120775008 161033344 166065636 171422592 221420848 228563456 241550016 322066688 332131272 342845184 442841696 483100032 644133376 664262544 685690368 885683392 966200064 1328525088 1771366784 1932400128 2657050176 3542733568 5314100352 7085467136 10628200704 21256401408
• Sum of all divisors σ(n): 63770775552
• Sum of proper divisors (its aliquot sum) s(n): 42514374144
• 21256401408 is an abundant number, because the sum of its proper divisors (42514374144) is greater than itself. Its abundance is 21257972736

Bases of 21256401408

• Binary: 10011110010111110101111001000000000₂
• Hexadecimal: 0x4F2FAF200
• Base-36: 9RJIGAO

Squares and roots of 21256401408

• 21256401408 squared (21256401408²) is 451834600818024382464
• 21256401408 cubed (21256401408³) is 9604377645011371435186100109312
• The square root of 21256401408 is 145795.7523661097
• The cube root of 21256401408 is 2770.1072307493

Scales and comparisons

• 21,256,401,408 seconds is equal to 675 years, 46 weeks, 1 day, 3 hours, 56 minutes, 48 seconds.
• To count from 1 to 21,256,401,408 would take you about one thousand, three hundred fifty-one 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 21256401408 cubic inches would be around 230.8 feet tall.

Recreational maths with 21256401408

• 21256401408 backwards is 80410465212
• 21256401408 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21256401408's digits is 33
• More coming soon!