18045019 has 2 divisors, whose sum is σ = 18045020. Its totient is φ = 18045018.

The previous prime is 18044981. The next prime is 18045031. The reversal of 18045019 is 91054081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18045019 - 2⁷ = 18044891 is a prime.

It is a super-2 number, since 2×18045019² = 651245421420722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18045319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022509 + 9022510.

It is an arithmetic number, because the mean of its divisors is an integer number (9022510).

Almost surely, 2^18045019 is an apocalyptic number.

18045019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18045019 is an equidigital number, since it uses as much as digits as its factorization.

18045019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 18045019 is about 4247.9429139290. The cubic root of 18045019 is about 262.2924448514.

The spelling of 18045019 in words is "eighteen million, forty-five thousand, nineteen".