Compare 20 vs 53

Typecomposite numberprime
Unique factors21
Total factors31
Prime factorization22 × 51531
Prime factorization2 × 2 × 553
Divisors count62
Divisors1, 2, 4, 5, 10, 201, 53
Number of properties018
Chen primes 15th
Class 1+ primes 10th
Good primes 7th
Isolated primes 5th
Left-truncatable primes 11th
Pierpont primes of the 2nd kind 10th
Primes 16th
Pythagorean primes 7th
Restricted right-truncatable primes 1st
Right-truncatable primes 9th
Sexy primes (1st member) 11th
Sexy primes (2nd member) 10th
Sexy prime quadrupletss (3rd member) 3rd
Sexy prime triplets (2nd member) 7th
Sexy prime triplets (3rd member) 6th
Sophie germain primes 8th
Two-sided primes 7th
Ulam primes 6th
Roman numberalsXXLIII
Base 21010021101012
Base 3202312223
Base 411043114
Base 54052035
Base 63261256
Base 72671047
Base 8248658
Base 9229589
Base 1020105310
Base 1119114911
Base 1218124512
Base 1317134113
Base 1416143b14
Base 1515153815
Base 1614163516
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