18316722 has 64 divisors (see below), whose sum is σ = 40919040. Its totient is φ = 5443200.

The previous prime is 18316693. The next prime is 18316729. The reversal of 18316722 is 22761381.

It is a self number, because there is not a number n which added to its sum of digits gives 18316722.

It is not an unprimeable number, because it can be changed into a prime (18316729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250878 + ... + 250950.

It is an arithmetic number, because the mean of its divisors is an integer number (639360).

Almost surely, 2^18316722 is an apocalyptic number.

18316722 is an abundant number, since it is smaller than the sum of its proper divisors (22602318).

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

18316722 is a wasteful number, since it uses less digits than its factorization.

18316722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199.

The product of its digits is 4032, while the sum is 30.

The square root of 18316722 is about 4279.8039674733. The cubic root of 18316722 is about 263.6023340288.

The spelling of 18316722 in words is "eighteen million, three hundred sixteen thousand, seven hundred twenty-two".