18330912 has 36 divisors (see below), whose sum is σ = 52129350. Its totient is φ = 6110208.

The previous prime is 18330911. The next prime is 18330941. The reversal of 18330912 is 21903381.

It can be written as a sum of positive squares in only one way, i.e., 17338896 + 992016 = 4164^2 + 996^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-4 number, since 4×18330912⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is not an unprimeable number, because it can be changed into a prime (18330911) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 31537 + ... + 32112.

Almost surely, 2^18330912 is an apocalyptic number.

18330912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18330912 is an abundant number, since it is smaller than the sum of its proper divisors (33798438).

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

18330912 is a wasteful number, since it uses less digits than its factorization.

18330912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63665 (or 63654 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 18330912 is about 4281.4614327353. The cubic root of 18330912 is about 263.6703875376.

The spelling of 18330912 in words is "eighteen million, three hundred thirty thousand, nine hundred twelve".