21490642736979

Names of 21490642736979

• Cardinal: 21490642736979 can be written as Twenty-one trillion, four hundred ninety billion, six hundred forty-two million, seven hundred thirty-six thousand, nine hundred seventy-nine.

Scientific notation

• Scientific notation: 2.1490642736979 × 10¹³

Factors of 21490642736979

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 216

Divisors of 21490642736979

• Number of divisors d(n): 240
• Complete list of divisors:
  1 3 13 19 23 39 57 61 69 97 169 183 247 291 299 437 507 741 793 897 1159 1261 1311 1403 1843 2197 2231 2379 3211 3477 3783 3887 4209 5529 5681 5917 6591 6693 9409 9633 10309 11661 15067 16393 17043 17751 18239 23959 26657 28227 28561 29003 30927 41743 42389 45201 49179 50531 54717 71877 73853 76921 79971 85683 87009 112423 122317 125229 127167 134017 136091 151593 178771 195871 213109 216407 221559 230763 237107 311467 337269 346541 366951 377039 402051 408273 536313 542659 551057 573949 587613 639327 649221 656903 711321 934401 960089 999973 1039623 1131117 1461499 1590121 1627977 1653171 1721847 1742221 1769183 1970709 2324023 2546323 2585729 2770417 2813291 2880267 2999919 3082391 4049071 4111733 4384497 4505033 4770363 4901507 5226663 5307549 6972069 7163741 7461337 7638969 7757187 8311251 8439873 9247173 10905031 12147213 12335199 12481157 12999649 13200827 13515099 14704521 18999487 20671573 21491223 22384011 22999379 30212299 32715093 33102199 33614477 36572783 37443471 38998947 39602481 40071083 52637923 53452529 56998461 58565429 62014719 63719591 68998137 90636897 93128633 96997381 99306597 100843431 109718349 120213249 141765403 157913769 160357587 168995437 171610751 175696287 191158773 246993331 250815713 268730449 279385899 290992143 298991927 392759887 425296209 436988201 475446179 506986311 514832253 694882877 740979993 752447139 761350577 806191347 896975781 1178279661 1210672229 1260965953 1310964603 1426338537 1842950239 2084648631 2230939763 2284051731 3210913303 3260604269 3632016687 3782897859 3886895051 5105878531 5528850717 5680846613 6180800327 6692819289 9033477401 9632739909 9781812807 11660685153 15317635593 16392557389 17042539839 18542400981 23958353107 27100432203 29002216919 42387855497 49177672167 71875059321 73851005969 87006650757 117435206213 127163566491 221553017907 311458590391 352305618639 377028819947 551042121461 934375771173 1131086459841 1653126364383 7163547578993 21490642736979
• Sum of all divisors σ(n): 35016340596480
• Sum of proper divisors (its aliquot sum) s(n): 13525697859501
• 21490642736979 is a deficient number, because the sum of its proper divisors (13525697859501) is less than itself. Its deficiency is 7964944877478

Bases of 21490642736979

• Binary: 100111000101110101110001000000101011101010011₂
• Hexadecimal: 0x138BAE205753
• Base-36: 7M8NXTAHF

Squares and roots of 21490642736979

• 21490642736979 squared (21490642736979²) is 461847725248468244174046441
• 21490642736979 cubed (21490642736979³) is 9925404462201266789803895878049694041739
• The square root of 21490642736979 is 4635800.1183160389
• The cube root of 21490642736979 is 27802.4542529787

Scales and comparisons

• 21,490,642,736,979 seconds is equal to 683,335 years, 50 weeks, 22 hours, 29 minutes, 39 seconds.
• To count from 1 to 21,490,642,736,979 would take you about one million, seven hundred eight thousand, three hundred thirty-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 21490642736979 cubic inches would be around 2316.9 feet tall.

Recreational maths with 21490642736979

• 21490642736979 backwards is 97963724609412
• 21490642736979 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21490642736979's digits is 69
• More coming soon!