18004118 has 16 divisors (see below), whose sum is σ = 30412800. Its totient is φ = 7919400.

The previous prime is 18004081. The next prime is 18004121. The reversal of 18004118 is 81140081.

It is a junction number, because it is equal to n+sod(n) for n = 18004093 and 18004102.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12518 + ... + 13881.

It is an arithmetic number, because the mean of its divisors is an integer number (1900800).

Almost surely, 2^18004118 is an apocalyptic number.

18004118 is a deficient number, since it is larger than the sum of its proper divisors (12408682).

18004118 is a wasteful number, since it uses less digits than its factorization.

18004118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26443.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 18004118 is about 4243.1259703195. The cubic root of 18004118 is about 262.0941234767.

Adding to 18004118 its reverse (81140081), we get a palindrome (99144199).

The spelling of 18004118 in words is "eighteen million, four thousand, one hundred eighteen".