1. Numbers
  2. Compare 18911 vs 18920

Compare 18911 vs 18920

Property1891118920
Typeprimecomposite number
Unique factors14
Total factors16
Prime factorization18911123 × 51 × 111 × 431
Prime factorization189112 × 2 × 2 × 5 × 11 × 43
Divisors count232
Divisors1, 189111, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 1720, 1892, 2365, 3784, 4730, 9460, 18920
Number of properties100
Centered decagonal primes32nd 
Chen primes1066th 
Emirps590th 
Good primes247th 
Harmonic primes775th 
Primes2151st 
Prime quadruplets (1st member)18th 
Prime triplets (1st member)161st 
Sexy primes (1st member)658th 
Twin primes (1st member)326th 
Roman numberals  
Base 210010011101111121001001111010002
Base 322122110232212212023
Base 4102131334102132204
Base 51101121511011405
Base 622331562233326
Base 710606471061067
Base 8447378447508
Base 9278429278529
Base 1018911101892010
Base 1113232111324011
Base 12ab3b12ab4812
Base 1387b91387c513
Base 146c6b146c7614
Base 15590b15591515
Base 1649df1649e816
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