18056312 has 32 divisors (see below), whose sum is σ = 36223200. Its totient is φ = 8408064.

The previous prime is 18056287. The next prime is 18056317. The reversal of 18056312 is 21365081.

Together with 18166888 it forms an amicable pair .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18056317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13364 + ... + 14652.

It is an arithmetic number, because the mean of its divisors is an integer number (1131975).

Almost surely, 2^18056312 is an apocalyptic number.

It is an amenable number.

18056312 is an abundant number, since it is smaller than the sum of its proper divisors (18166888).

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

18056312 is a wasteful number, since it uses less digits than its factorization.

18056312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415 (or 1411 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 18056312 is about 4249.2719376383. The cubic root of 18056312 is about 262.3471497145.

The spelling of 18056312 in words is "eighteen million, fifty-six thousand, three hundred twelve".