18231606 has 24 divisors (see below), whose sum is σ = 39683280. Its totient is φ = 6049296.

The previous prime is 18231601. The next prime is 18231671. The reversal of 18231606 is 60613281.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18231606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18231601) 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 11 ways as a sum of consecutive naturals, for example, 1911 + ... + 6333.

It is an arithmetic number, because the mean of its divisors is an integer number (1653470).

Almost surely, 2^18231606 is an apocalyptic number.

18231606 is an abundant number, since it is smaller than the sum of its proper divisors (21451674).

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

18231606 is a wasteful number, since it uses less digits than its factorization.

18231606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660 (or 4657 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18231606 is about 4269.8484750633. The cubic root of 18231606 is about 263.1933885837.

Adding to 18231606 its reverse (60613281), we get a palindrome (78844887).

The spelling of 18231606 in words is "eighteen million, two hundred thirty-one thousand, six hundred six".