Changes: 23

Revision as of 23:35, 27 December 2013

23

Basic Information

Cardinal Number

twenty three

Ordinal Number

twenty third

Roman Numeral

XXIII

Greek Numeral

ΚΓ´

Factorization

23

Different Representations

Binary Form

10111₂

Ternary Form

212₃

Quaternary Form

113₄

Quinary Form

43₅

Senary Form

35₆

Septenary Form

32₇

Octal Form

27₈

Nonary Form

25₉

Undecimal Form

21₁₁

Duodecimal Form

1B₁₂

Tridecimal Form

1A₁₃

Quattuordecimal Form

19₁₄

Quindecimal Form

18₁₅

Hexadecimal Form

17₁₆

Septendecimal Form

16₁₇

Octodecimal Form

15₁₈

Novemdecimal Form

14₁₉

Vigesimal Form

13₂₀

Unvigesimal Form

12₂₁

Duovigesimal Form

11₂₂

Trevigesimal Form

10₂₃

Quattuorvigesimal Form

N₂₄

Quinvigesimal Form

N₂₅

Hexavigesimal Form

N₂₆

Septenvigesimal Form

N₂₇

Octovigesimal Form

N₂₈

Novemvigesimal Form

N₂₉

Trigesimal Form

N₃₀

Untrigesimal Form

N₃₁

Duotrigesimal Form

N₃₂

Tretrigesimal Form

N₃₃

Quattuortrigesimal Form

N₃₄

Quintrigesimal Form

N₃₅

Hexatrigesimal Form

N₃₆

Previous	Current	Next
[[19]]	23	[[29]]

23 is a prime number from 1-100. 23 has two factors, 1 and 23. 23 is said to also be one of the numbers that when you add up its digits, you get a prime number. It is the ninth prime number, and the ninth prime number from 1-100.

Proofs

1 can divide 23
2 cannot
3 cannot
4 cannot
5 cannot
...22 cannot
23 can divide itself

Relationship with other odd numbers

The numbers before

The previous odd number, 21, is not a prime number. It is divisible by 3 and 7.
The odd number previous to 21 is 19. 19 is a prime number.
- 19 and 23 are four numbers apart; therefore, they are cousin primes.
The odd number previous to 19 is 17. 17 is a prime number.
- 17 and 23 are six numbers apart; therefore, they are sexy primes.

The numbers after

The next odd number, 25, is not a prime number. It is a square number, being 5² = 25.
27, the odd number following 25, is not a prime number. It is a cube number, being 3³ = 27.
29, the odd number following 27, is a prime number.
- 23 and 29 are six numbers apart; therefore, they are sexy primes.
Due to the fact that 23 is not part of any twin numbers, it is considered an isolated prime.

Prime Numbers 1-1,000

1-100
1-25	2 • 3 • 5 • 7 • 11 • 13 • 17 • 19 • 23
26-50	29 • 31 • 37 • 41 • 43 • 47
51-75	53 • 59 • 61 • 67 • 71 • 73
76-100	79 • 83 • 89 • 97

101-200
101-125	101 • 103 • 107 • 109 • 113
126-150	127 • 131 • 137 • 139 • 149
151-175	151 • 157 • 163 • 167 • 173
176-200	179 • 181 • 191 • 193 • 197 • 199

201-400
201-250	211 • 223 • 227 • 229 • 233 • 239 • 241
250-300	251 • 257 • 263 • 269 • 271 • 277 • 281 • 283 • 293
301-350	307 • 311 • 313 • 317 • 331 • 337 • 347 • 349
351-400	353 • 359 • 367 • 373 • 379 • 383 • 389 • 397

401-600
401-450	401 • 409 • 419 • 421 • 431 • 433 • 439 • 443 • 449
450-500	457 • 461 • 463 • 467 • 479 • 487 • 491 • 499
501-550	503 • 509 • 521 • 523 • 541 • 547
551-600	557 • 563 • 569 • 571 • 577 • 587 • 593 • 599

601-800
601-650	601 • 607 • 613 • 617 • 619 • 631 • 641 • 643 • 647
651-700	653 • 659 • 661 • 673 • 677 • 683 • 691
701-750	701 • 709 • 719 • 727 • 733 • 739 • 743
751-800	751 • 757 • 761 • 769 • 773 • 787 • 797

801-1,000
801-850	809 • 811 • 821 • 823 • 827 • 829 • 839
851-900	853 • 857 • 859 • 863 • 877 • 881 • 883 • 887
901-950	907 • 911 • 919 • 929 • 937 • 941 • 947
951-1000	953 • 967 • 971 • 977 • 983 • 991 • 997

@@ Line 5: / Line 5: @@
 |roman-number = XXIII
 |ordinal-number = twenty third
+|cardinal-number = twenty three
+|Base-2 Form = 10111
+|Base-3 Form = 212
+|Base-4 Form = 113
+|Base-5 Form = 43
+|Base-6 Form = 35
+|Base-7 Form = 32
+|Base-8 Form = 27
+|Base-9 Form = 25
 |previous = [[19|<font color="white">19</font>]]
 |next = [[29|<font color="white">29</font>]]}}23 is a [[1-100|prime number from 1-100]]. 23 has two factors, 1 and 23. 23 is said to also be one of the numbers that when you add up its digits, you get a prime number. It is the ninth prime number, and the ninth prime number from 1-100.