18042234 has 32 divisors (see below), whose sum is σ = 42664320. Its totient is φ = 4976832.

The previous prime is 18042221. The next prime is 18042239. The reversal of 18042234 is 43224081.

It is not an unprimeable number, because it can be changed into a prime (18042239) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6189 + ... + 8624.

It is an arithmetic number, because the mean of its divisors is an integer number (1333260).

Almost surely, 2^18042234 is an apocalyptic number.

18042234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18042234 is an abundant number, since it is smaller than the sum of its proper divisors (24622086).

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

18042234 is a wasteful number, since it uses less digits than its factorization.

18042234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14854.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 18042234 is about 4247.6150955566. The cubic root of 18042234 is about 262.2789504157.

The spelling of 18042234 in words is "eighteen million, forty-two thousand, two hundred thirty-four".