18236198 has 8 divisors (see below), whose sum is σ = 27380808. Its totient is φ = 9109264.

The previous prime is 18236191. The next prime is 18236201. The reversal of 18236198 is 89163281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18236191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436 + ... + 6207.

It is an arithmetic number, because the mean of its divisors is an integer number (3422601).

Almost surely, 2^18236198 is an apocalyptic number.

18236198 is a deficient number, since it is larger than the sum of its proper divisors (9144610).

18236198 is a wasteful number, since it uses less digits than its factorization.

18236198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8838.

The product of its digits is 20736, while the sum is 38.

The square root of 18236198 is about 4270.3861652080. The cubic root of 18236198 is about 263.2154835944.

The spelling of 18236198 in words is "eighteen million, two hundred thirty-six thousand, one hundred ninety-eight".