18504116 has 12 divisors (see below), whose sum is σ = 32525220. Its totient is φ = 9211200.

The previous prime is 18504077. The next prime is 18504133. The reversal of 18504116 is 61140581.

It can be written as a sum of positive squares in 2 ways, for example, as 6916900 + 11587216 = 2630^2 + 3404^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9185 + ... + 11016.

It is an arithmetic number, because the mean of its divisors is an integer number (2710435).

Almost surely, 2^18504116 is an apocalyptic number.

It is an amenable number.

18504116 is a deficient number, since it is larger than the sum of its proper divisors (14021104).

18504116 is a wasteful number, since it uses less digits than its factorization.

18504116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20434 (or 20432 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 18504116 is about 4301.6410821918. The cubic root of 18504116 is about 264.4982364868.

Adding to 18504116 its reverse (61140581), we get a palindrome (79644697).

The spelling of 18504116 in words is "eighteen million, five hundred four thousand, one hundred sixteen".