Prime Numbers
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Numbers
Compare 2 vs 19
Compare 2 vs 19
Compare
vs
Compare
Property
2
19
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
2
^{1}
19
^{1}
Prime factorization
2
19
Divisors count
2
2
Divisors
1
,
2
1
,
19
Number of properties
26
18
Additive primes
1st
Bell primes
1st
Centered triangular primes
1st
Chen primes
1st
8th
Class 1+ primes
1st
Cousin primes
(1st member)
4th
Cuban primes 1
2nd
Dihedral primes
1st
Euclid primes
1st
Factorial primes
1st
Fibonacci primes
1st
Happy primes
3rd
Isolated primes
1st
Kynea primes
1st
Left-truncatable primes
1st
Long primes
3rd
Lucas primes
1st
Mills primes
1st
Multiplicative primes
1st
Palindromic primes
1st
Pierpont primes
1st
7th
Pierpont primes of the 2nd kind
1st
Primes
1st
8th
Prime quadruplets
(4th member)
2nd
Prime quintuplet 1s
(5th member)
1st
Prime quintuplet 2s
(4th member)
2nd
Prime sextuplets
(5th member)
1st
Prime triplets
(2nd member)
5th
Prime triplets
(3rd member)
4th
Quartan primes
1st
Restricted left-truncatable primes
1st
Right-truncatable primes
1st
Sexy primes
(2nd member)
4th
Sexy prime triplets
(3rd member)
2nd
Solinas primes
7th
Sophie germain primes
1st
Thabit primes
1st
Twin primes
(2nd member)
4th
Two-sided primes
1st
Ulam primes
1st
Wedderburn-etherington primes
1st
Roman numberals
II
XIX
Base 2
10
_{2}
10011
_{2}
Base 3
2
_{3}
201
_{3}
Base 4
2
_{4}
103
_{4}
Base 5
2
_{5}
34
_{5}
Base 6
2
_{6}
31
_{6}
Base 7
2
_{7}
25
_{7}
Base 8
2
_{8}
23
_{8}
Base 9
2
_{9}
21
_{9}
Base 10
2
_{10}
19
_{10}
Base 11
2
_{11}
18
_{11}
Base 12
2
_{12}
17
_{12}
Base 13
2
_{13}
16
_{13}
Base 14
2
_{14}
15
_{14}
Base 15
2
_{15}
14
_{15}
Base 16
2
_{16}
13
_{16}
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