18345042 has 24 divisors (see below), whose sum is σ = 41220816. Its totient is φ = 6114852.

The previous prime is 18345037. The next prime is 18345071. The reversal of 18345042 is 24054381.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18344997 and 18345015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18388 + ... + 19359.

It is an arithmetic number, because the mean of its divisors is an integer number (1717534).

Almost surely, 2^18345042 is an apocalyptic number.

18345042 is an abundant number, since it is smaller than the sum of its proper divisors (22875774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18345042 is an equidigital number, since it uses as much as digits as its factorization.

18345042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37764 (or 37752 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 18345042 is about 4283.1112523492. Note that the first 3 decimals coincide. The cubic root of 18345042 is about 263.7381184049.

The spelling of 18345042 in words is "eighteen million, three hundred forty-five thousand, forty-two".