18785012 has 12 divisors (see below), whose sum is σ = 32907840. Its totient is φ = 9382776.

The previous prime is 18785009. The next prime is 18785021. The reversal of 18785012 is 21058781.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18785012.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 3539 + ... + 7077.

It is an arithmetic number, because the mean of its divisors is an integer number (2742320).

Almost surely, 2^18785012 is an apocalyptic number.

18785012 is the 3539-th pentagonal number.

It is an amenable number.

18785012 is a deficient number, since it is larger than the sum of its proper divisors (14122828).

18785012 is a wasteful number, since it uses less digits than its factorization.

18785012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4870 (or 4868 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 18785012 is about 4334.1679709028. The cubic root of 18785012 is about 265.8298985961.

The spelling of 18785012 in words is "eighteen million, seven hundred eighty-five thousand, twelve".