18389196 has 36 divisors (see below), whose sum is σ = 53125072. Its totient is φ = 5253984.

The previous prime is 18389191. The next prime is 18389221. The reversal of 18389196 is 69198381.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18389191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36235 + ... + 36738.

Almost surely, 2^18389196 is an apocalyptic number.

It is an amenable number.

18389196 is an abundant number, since it is smaller than the sum of its proper divisors (34735876).

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

18389196 is a wasteful number, since it uses less digits than its factorization.

18389196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72990 (or 72985 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 18389196 is about 4288.2625852436. The cubic root of 18389196 is about 263.9495426985.

The spelling of 18389196 in words is "eighteen million, three hundred eighty-nine thousand, one hundred ninety-six".