1. Numbers
  2. Compare 201813 vs 201821

Compare 201813 vs 201821

Property201813201821
Typesemiprimeprime
Unique factors21
Total factors21
Prime factorization31 × 6727112018211
Prime factorization3 × 67271201821
Divisors count42
Divisors1, 3, 67271, 2018131, 201821
Number of properties110
Chen primes 7581st
Long primes 6796th
Primes 18129th
Prime quadruplets (1st member) 54th
Prime quintuplet 2s (1st member) 15th
Prime triplets (1st member) 844th
Pythagorean primes 9050th
Semiprimes45626th 
Sexy primes (1st member) 4326th
Sexy prime triplets (1st member) 870th
Twin primes (1st member) 2172nd
Roman numberals  
Base 211000101000101010121100010100010111012
Base 310102021112031010202112123
Base 430110111143011011314
Base 5224242235224242415
Base 64154153641542056
Base 71500243715002547
Base 861212586121358
Base 933674693367559
Base 102018131020182110
Base 11128697111286a411
Base 1298959129896512
Base 1370b211370b2913
Base 1453793145379b14
Base 153ebe3153ebeb15
Base 1631455163145d16
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