18004934 has 4 divisors (see below), whose sum is σ = 27007404. Its totient is φ = 9002466.

The previous prime is 18004933. The next prime is 18004937. The reversal of 18004934 is 43940081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43940081 = 491 ⋅89491.

It is a junction number, because it is equal to n+sod(n) for n = 18004897 and 18004906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18004933) 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 as a sum of consecutive naturals, namely, 4501232 + ... + 4501235.

It is an arithmetic number, because the mean of its divisors is an integer number (6751851).

Almost surely, 2^18004934 is an apocalyptic number.

18004934 is a deficient number, since it is larger than the sum of its proper divisors (9002470).

18004934 is an equidigital number, since it uses as much as digits as its factorization.

18004934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9002469.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 18004934 is about 4243.2221247538. Note that the first 3 decimals coincide. The cubic root of 18004934 is about 262.0980830445.

The spelling of 18004934 in words is "eighteen million, four thousand, nine hundred thirty-four".