18042057 has 12 divisors (see below), whose sum is σ = 28430064. Its totient is φ = 10934520.

The previous prime is 18042047. The next prime is 18042067. The reversal of 18042057 is 75024081.

It is an interprime number because it is at equal distance from previous prime (18042047) and next prime (18042067).

It is not a de Polignac number, because 18042057 - 2⁸ = 18041801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18042057.

It is not an unprimeable number, because it can be changed into a prime (18042047) 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 in 11 ways as a sum of consecutive naturals, for example, 91023 + ... + 91220.

It is an arithmetic number, because the mean of its divisors is an integer number (2369172).

Almost surely, 2^18042057 is an apocalyptic number.

It is an amenable number.

18042057 is a deficient number, since it is larger than the sum of its proper divisors (10388007).

18042057 is a wasteful number, since it uses less digits than its factorization.

18042057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182260 (or 182257 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18042057 is about 4247.5942602843. The cubic root of 18042057 is about 262.2780927332.

The spelling of 18042057 in words is "eighteen million, forty-two thousand, fifty-seven".