1. Numbers
  2. Compare 20981 vs 20989

Compare 20981 vs 20989

Property2098120989
Typeprimesemiprime
Unique factors12
Total factors12
Prime factorization2098111391 × 1511
Prime factorization20981139 × 151
Divisors count24
Divisors1, 209811, 139, 151, 20989
Number of properties51
Chen primes1161st 
Good primes265th 
Primes2359th 
Pythagorean primes1172nd 
Semiprimes 5324th
Twin primes (1st member)357th 
Roman numberals  
Base 210100011111010121010001111111012
Base 31001210002310012101013
Base 4110133114110133314
Base 51132411511324245
Base 624104562411016
Base 711511271151237
Base 8507658507758
Base 9317029317119
Base 1020981102098910
Base 1114844111485111
Base 1210185121019112
Base 13971c13972713
Base 14790914791314
Base 15633b15634415
Base 1651f51651fd16
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