21399987456

Names of 21399987456

• Cardinal: 21399987456 can be written as Twenty-one billion, three hundred ninety-nine million, nine hundred eighty-seven thousand, four hundred fifty-six.

Scientific notation

• Scientific notation: 2.1399987456 × 10¹⁰

Factors of 21399987456

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 19
• Sum of prime factors: 173

Divisors of 21399987456

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 31 32 36 48 54 62 64 72 81 93 96 108 124 128 137 144 162 186 192 216 243 248 256 274 279 288 324 372 384 411 432 486 496 548 558 576 648 729 744 768 822 837 864 972 992 1096 1116 1152 1233 1296 1458 1488 1644 1674 1728 1944 1984 2187 2192 2232 2304 2466 2511 2592 2916 2976 3288 3348 3456 3699 3888 3968 4247 4374 4384 4464 4932 5022 5184 5832 5952 6561 6576 6696 6912 7398 7533 7776 7936 8494 8748 8768 8928 9864 10044 10368 11097 11664 11904 12741 13122 13152 13392 14796 15066 15552 16988 17496 17536 17856 19683 19728 20088 20736 22194 22599 23328 23808 25482 26244 26304 26784 29592 30132 31104 33291 33976 34992 35072 35712 38223 39366 39456 40176 44388 45198 46656 50964 52488 52608 53568 59184 60264 62208 66582 67797 67952 69984 71424 76446 78732 78912 80352 88776 90396 93312 99873 101928 104976 105216 107136 114669 118368 120528 133164 135594 135904 139968 152892 157464 157824 160704 177552 180792 186624 199746 203391 203856 209952 214272 229338 236736 241056 266328 271188 271808 279936 299619 305784 314928 315648 321408 344007 355104 361584 399492 406782 407712 419904 458676 473472 482112 532656 542376 543616 559872 599238 610173 611568 629856 642816 688014 710208 723168 798984 813564 815424 839808 898857 917352 946944 964224 1032021 1065312 1084752 1087232 1198476 1220346 1223136 1259712 1376028 1420416 1446336 1597968 1627128 1630848 1679616 1797714 1834704 1928448 2064042 2130624 2169504 2396952 2440692 2446272 2519424 2696571 2752056 2840832 2892672 3096063 3195936 3254256 3261696 3595428 3669408 4128084 4261248 4339008 4793904 4881384 4892544 5038848 5393142 5504112 5785344 6192126 6391872 6508512 7190856 7338816 8256168 8522496 8678016 9288189 9587808 9762768 9785088 10786284 11008224 12384252 12783744 13017024 14381712 14677632 16512336 17356032 18576378 19175616 19525536 21572568 22016448 24768504 25567488 26034048 27864567 28763424 29355264 33024672 37152756 38351232 39051072 43145136 44032896 49537008 52068096 55729134 57526848 66049344 74305512 76702464 78102144 83593701 86290272 88065792 99074016 111458268 115053696 132098688 148611024 156204288 167187402 172580544 198148032 222916536 230107392 264197376 297222048 334374804 345161088 396296064 445833072 594444096 668749608 690322176 792592128 891666144 1188888192 1337499216 1783332288 2377776384 2674998432 3566664576 5349996864 7133329152 10699993728 21399987456
• Sum of all divisors σ(n): 66623149824
• Sum of proper divisors (its aliquot sum) s(n): 45223162368
• 21399987456 is an abundant number, because the sum of its proper divisors (45223162368) is greater than itself. Its abundance is 23823174912

Bases of 21399987456

• Binary: 10011111011100010011110010100000000₂
• Hexadecimal: 0x4FB89E500
• Base-36: 9TX0000

Squares and roots of 21399987456

• 21399987456 squared (21399987456²) is 457959463116957351936
• 21399987456 cubed (21399987456³) is 9800326766059381992317377314816
• The square root of 21399987456 is 146287.3455087623
• The cube root of 21399987456 is 2776.3305560799

Scales and comparisons

• 21,399,987,456 seconds is equal to 680 years, 23 weeks, 4 days, 57 minutes, 36 seconds.
• To count from 1 to 21,399,987,456 would take you about one thousand, three hundred sixty 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 21399987456 cubic inches would be around 231.4 feet tall.

Recreational maths with 21399987456

• 21399987456 backwards is 65478999312
• The number of decimal digits it has is: 11
• The sum of 21399987456's digits is 63
• More coming soon!