Compare 23 vs 42

Typeprimecomposite number
Unique factors13
Total factors13
Prime factorization23121 × 31 × 71
Prime factorization232 × 3 × 7
Divisors count28
Divisors1, 231, 2, 3, 6, 7, 14, 21, 42
Number of properties300
Additive primes6th 
Chen primes9th 
Class 1+ primes7th 
Cousin primes (2nd member)4th 
Factorial primes5th 
Happy primes4th 
Harmonic primes4th 
Isolated primes2nd 
Kynea primes3rd 
Left-truncatable primes7th 
Long primes4th 
Pierpont primes of the 2nd kind7th 
Prime quintuplet 2s (5th member)2nd 
Prime sextuplets (6th member)1st 
Prime triplets (3rd member)5th 
Right-truncatable primes5th 
Safe primes4th 
Sexy primes (1st member)6th 
Sexy primes (2nd member)5th 
Sexy prime quadrupletss (4th member)1st 
Sexy prime quadrupletss (3rd member)2nd 
Sexy prime triplets (2nd member)4th 
Sexy prime triplets (3rd member)3rd 
Solinas primes8th 
Sophie germain primes5th 
Thabit primes4th 
Two-sided primes5th 
Wedderburn-etherington primes4th 
Woodall primes2nd 
Roman numberalsXXIIIXLII
Base 21011121010102
Base 3212311203
Base 411342224
Base 54351325
Base 63561106
Base 7327607
Base 8278528
Base 9259469
Base 1023104210
Base 1121113911
Base 121b123612
Base 131a133313
Base 1419143014
Base 1518152c15
Base 1617162a16
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