Compare 18 vs 47

Typecomposite numberprime
Unique factors21
Total factors31
Prime factorization21 × 32471
Prime factorization2 × 3 × 347
Divisors count62
Divisors1, 2, 3, 6, 9, 181, 47
Number of properties021
Additive primes 10th
Carol primes 2nd
Chen primes 14th
Class 1+ primes 9th
Cousin primes (2nd member) 6th
Isolated primes 4th
Left-truncatable primes 10th
Long primes 6th
Lucas primes 6th
Pierpont primes of the 2nd kind 9th
Primes 15th
Prime triplets (3rd member) 7th
Safe primes 5th
Sexy primes (1st member) 10th
Sexy primes (2nd member) 9th
Sexy prime quadrupletss (2nd member) 3rd
Sexy prime triplets (1st member) 7th
Sexy prime triplets (2nd member) 6th
Solinas primes 13th
Thabit primes 5th
Ulam primes 5th
Roman numberalsXVIIIXLVII
Base 21001021011112
Base 3200312023
Base 410242334
Base 53351425
Base 63061156
Base 7247657
Base 8228578
Base 9209529
Base 1018104710
Base 1117114311
Base 1216123b12
Base 1315133813
Base 1414143514
Base 1513153215
Base 1612162f16
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