18184412 has 12 divisors (see below), whose sum is σ = 32105136. Its totient is φ = 9011520.

The previous prime is 18184409. The next prime is 18184417. The reversal of 18184412 is 21448181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18184417) by changing a digit.

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, 19664 + ... + 20567.

It is an arithmetic number, because the mean of its divisors is an integer number (2675428).

Almost surely, 2^18184412 is an apocalyptic number.

It is an amenable number.

18184412 is a deficient number, since it is larger than the sum of its proper divisors (13920724).

18184412 is a wasteful number, since it uses less digits than its factorization.

18184412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40348 (or 40346 counting only the distinct ones).

The product of its digits is 2048, while the sum is 29.

The square root of 18184412 is about 4264.3184684073. The cubic root of 18184412 is about 262.9660931580.

The spelling of 18184412 in words is "eighteen million, one hundred eighty-four thousand, four hundred twelve".