18722182 has 12 divisors (see below), whose sum is σ = 29640276. Its totient is φ = 8868060.

The previous prime is 18722173. The next prime is 18722183. The reversal of 18722182 is 28122781.

It is a super-2 number, since 2×18722182² = 701040197682248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18722183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12244 + ... + 13687.

It is an arithmetic number, because the mean of its divisors is an integer number (2470023).

Almost surely, 2^18722182 is an apocalyptic number.

18722182 is a deficient number, since it is larger than the sum of its proper divisors (10918094).

18722182 is a wasteful number, since it uses less digits than its factorization.

18722182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25971 (or 25952 counting only the distinct ones).

The product of its digits is 3584, while the sum is 31.

The square root of 18722182 is about 4326.9136806736. The cubic root of 18722182 is about 265.5331948853.

The spelling of 18722182 in words is "eighteen million, seven hundred twenty-two thousand, one hundred eighty-two".