18317012 has 24 divisors (see below), whose sum is σ = 37328256. Its totient is φ = 7701408.

The previous prime is 18316999. The next prime is 18317027. The reversal of 18317012 is 21071381.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4688 + ... + 7655.

It is an arithmetic number, because the mean of its divisors is an integer number (1555344).

Almost surely, 2^18317012 is an apocalyptic number.

It is an amenable number.

18317012 is an abundant number, since it is smaller than the sum of its proper divisors (19011244).

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

18317012 is a wasteful number, since it uses less digits than its factorization.

18317012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12407 (or 12405 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 18317012 is about 4279.8378473956. The cubic root of 18317012 is about 263.6037251852.

Adding to 18317012 its reverse (21071381), we get a palindrome (39388393).

The spelling of 18317012 in words is "eighteen million, three hundred seventeen thousand, twelve".