18306822 has 16 divisors (see below), whose sum is σ = 36805680. Its totient is φ = 6070272.

The previous prime is 18306809. The next prime is 18306839. The reversal of 18306822 is 22860381.

It is a self number, because there is not a number n which added to its sum of digits gives 18306822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6747 + ... + 9062.

It is an arithmetic number, because the mean of its divisors is an integer number (2300355).

Almost surely, 2^18306822 is an apocalyptic number.

18306822 is an abundant number, since it is smaller than the sum of its proper divisors (18498858).

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

18306822 is a wasteful number, since it uses less digits than its factorization.

18306822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16007.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18306822 is about 4278.6472161187. The cubic root of 18306822 is about 263.5548340192.

The spelling of 18306822 in words is "eighteen million, three hundred six thousand, eight hundred twenty-two".