18182196 has 18 divisors (see below), whose sum is σ = 45960642. Its totient is φ = 6060720.

The previous prime is 18182149. The next prime is 18182201. The reversal of 18182196 is 69128181.

It can be written as a sum of positive squares in only one way, i.e., 18147600 + 34596 = 4260^2 + 186^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 505061 = 18182196 / (1 + 8 + 1 + 8 + 2 + 1 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 18182196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 252495 + ... + 252566.

It is an arithmetic number, because the mean of its divisors is an integer number (2553369).

Almost surely, 2^18182196 is an apocalyptic number.

It is an amenable number.

18182196 is an abundant number, since it is smaller than the sum of its proper divisors (27778446).

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

18182196 is a wasteful number, since it uses less digits than its factorization.

18182196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505071 (or 505066 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 18182196 is about 4264.0586299909. The cubic root of 18182196 is about 262.9554108122.

The spelling of 18182196 in words is "eighteen million, one hundred eighty-two thousand, one hundred ninety-six".