18307836 has 48 divisors (see below), whose sum is σ = 47712000. Its totient is φ = 6070896.

The previous prime is 18307831. The next prime is 18307907. The reversal of 18307836 is 63870381.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18307836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18307831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30265 + ... + 30863.

It is an arithmetic number, because the mean of its divisors is an integer number (994000).

Almost surely, 2^18307836 is an apocalyptic number.

It is an amenable number.

18307836 is an abundant number, since it is smaller than the sum of its proper divisors (29404164).

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

18307836 is a wasteful number, since it uses less digits than its factorization.

18307836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18307836 is about 4278.7657098748. The cubic root of 18307836 is about 263.5596999587.

The spelling of 18307836 in words is "eighteen million, three hundred seven thousand, eight hundred thirty-six".