18604312 has 16 divisors (see below), whose sum is σ = 36086400. Its totient is φ = 8981280.

The previous prime is 18604297. The next prime is 18604321. The reversal of 18604312 is 21340681.

It is a super-2 number, since 2×18604312² = 692240849986688, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 39864 + ... + 40327.

It is an arithmetic number, because the mean of its divisors is an integer number (2255400).

Almost surely, 2^18604312 is an apocalyptic number.

It is an amenable number.

18604312 is a deficient number, since it is larger than the sum of its proper divisors (17482088).

18604312 is a wasteful number, since it uses less digits than its factorization.

18604312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80226 (or 80222 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 18604312 is about 4313.2716121292. The cubic root of 18604312 is about 264.9747786605.

Adding to 18604312 its reverse (21340681), we get a palindrome (39944993).

The spelling of 18604312 in words is "eighteen million, six hundred four thousand, three hundred twelve".