1. Numbers
  2. Compare 19997 vs 20021

Compare 19997 vs 20021

Property1999720021
Typeprimeprime
Unique factors11
Total factors11
Prime factorization199971200211
Prime factorization1999720021
Divisors count22
Divisors1, 199971, 20021
Number of properties96
Additive primes 1051st
Chen primes1112th1113th
Cousin primes (2nd member)344th 
Happy primes377th 
Harmonic primes821st822nd
Isolated primes1579th 
Primes2262nd2264th
Prime triplets (3rd member)168th 
Pythagorean primes1125th1126th
Sexy primes (2nd member)693rd 
Twin primes (1st member) 343rd
Roman numberals  
Base 210011100001110121001110001101012
Base 31000102122310001101123
Base 4103201314103203114
Base 51114442511200415
Base 623232562324056
Base 711220571122417
Base 8470358470658
Base 9303789304159
Base 1019997102002110
Base 111402a111405111
Base 12b6a512b70512
Base 13914313916113
Base 14740514742114
Base 155dd2155deb15
Base 164e1d164e3516
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