18173196 has 54 divisors (see below), whose sum is σ = 48654060. Its totient is φ = 5703696.

The previous prime is 18173191. The next prime is 18173203. The reversal of 18173196 is 69137181.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18173196.

It is not an unprimeable number, because it can be changed into a prime (18173191) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 111411 + ... + 111573.

Almost surely, 2^18173196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18173196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24327030).

18173196 is an abundant number, since it is smaller than the sum of its proper divisors (30480864).

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

18173196 is a wasteful number, since it uses less digits than its factorization.

18173196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 187 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 18173196 is about 4263.0031667828. The cubic root of 18173196 is about 262.9120169103.

The spelling of 18173196 in words is "eighteen million, one hundred seventy-three thousand, one hundred ninety-six".