18112019 has 2 divisors, whose sum is σ = 18112020. Its totient is φ = 18112018.

The previous prime is 18112009. The next prime is 18112121. The reversal of 18112019 is 91021181.

It is a weak prime.

It is an emirp because it is prime and its reverse (91021181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18112019 - 2⁸ = 18111763 is a prime.

It is a super-2 number, since 2×18112019² = 656090464512722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 18111985 and 18112003.

It is not a weakly prime, because it can be changed into another prime (18112009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9056009 + 9056010.

It is an arithmetic number, because the mean of its divisors is an integer number (9056010).

Almost surely, 2^18112019 is an apocalyptic number.

18112019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18112019 is an equidigital number, since it uses as much as digits as its factorization.

18112019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 18112019 is about 4255.8217772834. The cubic root of 18112019 is about 262.6166689246.

The spelling of 18112019 in words is "eighteen million, one hundred twelve thousand, nineteen".