1. Numbers
  2. Compare 19990 vs 19991

Compare 19990 vs 19991

Property1999019991
Typecomposite numberprime
Unique factors31
Total factors31
Prime factorization21 × 51 × 19991199911
Prime factorization2 × 5 × 199919991
Divisors count82
Divisors1, 2, 5, 10, 1999, 3998, 9995, 199901, 19991
Number of properties09
Additive primes 1049th
Chen primes 1111th
Harmonic primes 820th
Palindromic primes 46th
Primes 2260th
Prime triplets (1st member) 168th
Sexy primes (1st member) 693rd
Sophie germain primes 326th
Twin primes (1st member) 342nd
Roman numberals  
Base 210011100001011021001110000101112
Base 31000102101310001021023
Base 4103201124103201134
Base 51114430511144315
Base 623231462323156
Base 711216571121667
Base 8470268470278
Base 9303719303729
Base 1019990101999110
Base 1114023111402411
Base 12b69a12b69b12
Base 13913913913a13
Base 1473dc1473dd14
Base 155dca155dcb15
Base 164e16164e1716
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