18122190 has 16 divisors (see below), whose sum is σ = 43493328. Its totient is φ = 4832576.

The previous prime is 18122179. The next prime is 18122191. The reversal of 18122190 is 9122181.

It is a super-2 number, since 2×18122190² = 656827540792200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18122190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18122191) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 302007 + ... + 302066.

It is an arithmetic number, because the mean of its divisors is an integer number (2718333).

Almost surely, 2^18122190 is an apocalyptic number.

18122190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18122190 is an abundant number, since it is smaller than the sum of its proper divisors (25371138).

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

18122190 is a wasteful number, since it uses less digits than its factorization.

18122190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604083.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 18122190 is about 4257.0165609262. The cubic root of 18122190 is about 262.6658181351.

Subtracting from 18122190 its reverse (9122181), we obtain a palindrome (9000009).

The spelling of 18122190 in words is "eighteen million, one hundred twenty-two thousand, one hundred ninety".