18204112 has 20 divisors (see below), whose sum is σ = 36487620. Its totient is φ = 8787968.

The previous prime is 18204091. The next prime is 18204113. The reversal of 18204112 is 21140281.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4096576 + 14107536 = 2024^2 + 3756^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18204112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18204113) 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 3 ways as a sum of consecutive naturals, for example, 19153 + ... + 20080.

It is an arithmetic number, because the mean of its divisors is an integer number (1824381).

Almost surely, 2^18204112 is an apocalyptic number.

It is an amenable number.

18204112 is an abundant number, since it is smaller than the sum of its proper divisors (18283508).

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

18204112 is a wasteful number, since it uses less digits than its factorization.

18204112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39270 (or 39264 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 18204112 is about 4266.6277081555. The cubic root of 18204112 is about 263.0610199270.

Adding to 18204112 its reverse (21140281), we get a palindrome (39344393).

The spelling of 18204112 in words is "eighteen million, two hundred four thousand, one hundred twelve".