# Compare 11 vs 18

Property | 11 | 18 |
---|---|---|

Type | prime | composite number |

Unique factors | 1 | 2 |

Total factors | 1 | 3 |

Prime factorization | 11^{1} | 2^{1} × 3^{2} |

Prime factorization | 11 | 2 × 3 × 3 |

Divisors count | 2 | 6 |

Divisors | 1, 11 | 1, 2, 3, 6, 9, 18 |

Number of properties | 36 | 0 |

Additive primes | 5th | |

Centered decagonal primes | 1st | |

Chen primes | 5th | |

Class 1+ primes | 5th | |

Cousin primes (2nd member) | 2nd | |

Dihedral primes | 3rd | |

Good primes | 2nd | |

Lucas primes | 4th | |

Mills primes | 2nd | |

Palindromic primes | 5th | |

Pierpont primes of the 2nd kind | 5th | |

Primes | 5th | |

Prime quadruplets (1st member) | 2nd | |

Prime quadruplets (3rd member) | 1st | |

Prime quintuplet 1s (2nd member) | 1st | |

Prime quintuplet 2s (1st member) | 2nd | |

Prime quintuplet 2s (3rd member) | 1st | |

Prime sextuplets (2nd member) | 1st | |

Prime triplets (1st member) | 3rd | |

Prime triplets (2nd member) | 2nd | |

Prime triplets (3rd member) | 1st | |

Safe primes | 3rd | |

Sexy primes (1st member) | 3rd | |

Sexy primes (2nd member) | 1st | |

Sexy prime quadrupletss (1st member) | 2nd | |

Sexy prime quadrupletss (2nd member) | 1st | |

Sexy prime triplets (1st member) | 3rd | |

Sexy prime triplets (2nd member) | 1st | |

Solinas primes | 4th | |

Sophie germain primes | 4th | |

Super primes | 3rd | |

Thabit primes | 3rd | |

Twin primes (1st member) | 3rd | |

Ulam primes | 3rd | |

Wagstaff primes | 2nd | |

Wedderburn-etherington primes | 3rd | |

Roman numberals | XI | XVIII |

Base 2 | 1011_{2} | 10010_{2} |

Base 3 | 102_{3} | 200_{3} |

Base 4 | 23_{4} | 102_{4} |

Base 5 | 21_{5} | 33_{5} |

Base 6 | 15_{6} | 30_{6} |

Base 7 | 14_{7} | 24_{7} |

Base 8 | 13_{8} | 22_{8} |

Base 9 | 12_{9} | 20_{9} |

Base 10 | 11_{10} | 18_{10} |

Base 11 | 10_{11} | 17_{11} |

Base 12 | b_{12} | 16_{12} |

Base 13 | b_{13} | 15_{13} |

Base 14 | b_{14} | 14_{14} |

Base 15 | b_{15} | 13_{15} |

Base 16 | b_{16} | 12_{16} |