18055712 has 24 divisors (see below), whose sum is σ = 35646156. Its totient is φ = 9002752.

The previous prime is 18055699. The next prime is 18055721. The reversal of 18055712 is 21755081.

It can be written as a sum of positive squares in 2 ways, for example, as 12082576 + 5973136 = 3476^2 + 2444^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17318 + ... + 18330.

Almost surely, 2^18055712 is an apocalyptic number.

It is an amenable number.

18055712 is a deficient number, since it is larger than the sum of its proper divisors (17590444).

18055712 is a wasteful number, since it uses less digits than its factorization.

18055712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 18055712 is about 4249.2013367220. The cubic root of 18055712 is about 262.3442438049.

The spelling of 18055712 in words is "eighteen million, fifty-five thousand, seven hundred twelve".