18434394 has 24 divisors (see below), whose sum is σ = 43572672. Its totient is φ = 5586120.

The previous prime is 18434393. The next prime is 18434417. The reversal of 18434394 is 49343481.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18434393) 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, 46354 + ... + 46749.

It is an arithmetic number, because the mean of its divisors is an integer number (1815528).

Almost surely, 2^18434394 is an apocalyptic number.

18434394 is an abundant number, since it is smaller than the sum of its proper divisors (25138278).

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

18434394 is a wasteful number, since it uses less digits than its factorization.

18434394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93122 (or 93119 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 18434394 is about 4293.5293174730. The cubic root of 18434394 is about 264.1656157791.

The spelling of 18434394 in words is "eighteen million, four hundred thirty-four thousand, three hundred ninety-four".