Compare 11 vs 18

Typeprimecomposite number
Unique factors12
Total factors13
Prime factorization11121 × 32
Prime factorization112 × 3 × 3
Divisors count26
Divisors1, 111, 2, 3, 6, 9, 18
Number of properties360
Additive primes5th 
Centered decagonal primes1st 
Chen primes5th 
Class 1+ primes5th 
Cousin primes (2nd member)2nd 
Dihedral primes3rd 
Good primes2nd 
Lucas primes4th 
Mills primes2nd 
Palindromic primes5th 
Pierpont primes of the 2nd kind5th 
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 primes3rd 
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 primes4th 
Sophie germain primes4th 
Super primes3rd 
Thabit primes3rd 
Twin primes (1st member)3rd 
Ulam primes3rd 
Wagstaff primes2nd 
Wedderburn-etherington primes3rd 
Roman numberalsXIXVIII
Base 210112100102
Base 310232003
Base 42341024
Base 5215335
Base 6156306
Base 7147247
Base 8138228
Base 9129209
Base 1011101810
Base 1110111711
Base 12b121612
Base 13b131513
Base 14b141414
Base 15b151315
Base 16b161216
This website uses cookies to ensure you get the best experience on our website. More info