18196019 has 2 divisors, whose sum is σ = 18196020. Its totient is φ = 18196018.

The previous prime is 18195937. The next prime is 18196027. The reversal of 18196019 is 91069181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18196019 - 2¹² = 18191923 is a prime.

It is a super-2 number, since 2×18196019² = 662190214896722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18196019.

It is not a weakly prime, because it can be changed into another prime (18196049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098009 + 9098010.

It is an arithmetic number, because the mean of its divisors is an integer number (9098010).

Almost surely, 2^18196019 is an apocalyptic number.

18196019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18196019 is an equidigital number, since it uses as much as digits as its factorization.

18196019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 18196019 is about 4265.6791956264. The cubic root of 18196019 is about 263.0220311461.

The spelling of 18196019 in words is "eighteen million, one hundred ninety-six thousand, nineteen".