18165522 has 32 divisors (see below), whose sum is σ = 37477440. Its totient is φ = 5866560.

The previous prime is 18165491. The next prime is 18165551. The reversal of 18165522 is 22556181.

It is a self number, because there is not a number n which added to its sum of digits gives 18165522.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 46504 + ... + 46892.

It is an arithmetic number, because the mean of its divisors is an integer number (1171170).

Almost surely, 2^18165522 is an apocalyptic number.

18165522 is an abundant number, since it is smaller than the sum of its proper divisors (19311918).

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

18165522 is a wasteful number, since it uses less digits than its factorization.

18165522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

The product of its digits is 4800, while the sum is 30.

The square root of 18165522 is about 4262.1030020402. The cubic root of 18165522 is about 262.8750050592.

It can be divided in two parts, 181 and 65522, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 18165522 in words is "eighteen million, one hundred sixty-five thousand, five hundred twenty-two".