18504012 has 48 divisors (see below), whose sum is σ = 44352000. Its totient is φ = 6002880.

The previous prime is 18503999. The next prime is 18504023. The reversal of 18504012 is 21040581.

It is a super-2 number, since 2×18504012² = 684796920192288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18504012.

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 15 ways as a sum of consecutive naturals, for example, 124114 + ... + 124262.

It is an arithmetic number, because the mean of its divisors is an integer number (924000).

Almost surely, 2^18504012 is an apocalyptic number.

18504012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18504012 is an abundant number, since it is smaller than the sum of its proper divisors (25847988).

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

18504012 is a wasteful number, since it uses less digits than its factorization.

18504012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 18504012 is about 4301.6289937650. The cubic root of 18504012 is about 264.4977409598.

Adding to 18504012 its reverse (21040581), we get a palindrome (39544593).

The spelling of 18504012 in words is "eighteen million, five hundred four thousand, twelve".