Compare 19 vs 23

Unique factors11
Total factors11
Prime factorization191231
Prime factorization1923
Divisors count22
Divisors1, 191, 23
Number of properties1830
Additive primes 6th
Centered triangular primes1st 
Chen primes8th9th
Class 1+ primes 7th
Cousin primes (1st member)4th 
Cousin primes (2nd member) 4th
Cuban primes 12nd 
Factorial primes 5th
Happy primes3rd4th
Harmonic primes 4th
Isolated primes 2nd
Kynea primes 3rd
Left-truncatable primes 7th
Long primes3rd4th
Pierpont primes7th 
Pierpont primes of the 2nd kind 7th
Prime quadruplets (4th member)2nd 
Prime quintuplet 1s (5th member)1st 
Prime quintuplet 2s (4th member)2nd 
Prime quintuplet 2s (5th member) 2nd
Prime sextuplets (5th member)1st 
Prime sextuplets (6th member) 1st
Prime triplets (2nd member)5th 
Prime triplets (3rd member)4th5th
Right-truncatable primes 5th
Safe primes 4th
Sexy primes (1st member) 6th
Sexy primes (2nd member)4th5th
Sexy prime quadrupletss (3rd member) 2nd
Sexy prime quadrupletss (4th member) 1st
Sexy prime triplets (2nd member) 4th
Sexy prime triplets (3rd member)2nd3rd
Solinas primes7th8th
Sophie germain primes 5th
Thabit primes 4th
Twin primes (2nd member)4th 
Two-sided primes 5th
Wedderburn-etherington primes 4th
Woodall primes 2nd
Roman numberalsXIXXXIII
Base 2100112101112
Base 320132123
Base 410341134
Base 5345435
Base 6316356
Base 7257327
Base 8238278
Base 9219259
Base 1019102310
Base 1118112111
Base 1217121b12
Base 1316131a13
Base 1415141914
Base 1514151815
Base 1613161716
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