18182161836 has 72 divisors (see below), whose sum is σ = 46336843280. Its totient is φ = 6011231616.

The previous prime is 18182161807. The next prime is 18182161841. The reversal of 18182161836 is 63816128181.

18182161836 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 21 + 618 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18182161791 and 18182161800.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3495990 + ... + 3501186.

Almost surely, 2^18182161836 is an apocalyptic number.

It is an amenable number.

18182161836 is an abundant number, since it is smaller than the sum of its proper divisors (28154681444).

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

18182161836 is a wasteful number, since it uses less digits than its factorization.

18182161836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983 (or 5978 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The spelling of 18182161836 in words is "eighteen billion, one hundred eighty-two million, one hundred sixty-one thousand, eight hundred thirty-six".