18093998 has 16 divisors (see below), whose sum is σ = 29309280. Its totient is φ = 8328096.

The previous prime is 18093991. The next prime is 18094007. The reversal of 18093998 is 89939081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18093991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11948 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (1831830).

Almost surely, 2^18093998 is an apocalyptic number.

18093998 is a deficient number, since it is larger than the sum of its proper divisors (11215282).

18093998 is a wasteful number, since it uses less digits than its factorization.

18093998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 18093998 is about 4253.7040329576. The cubic root of 18093998 is about 262.5295410443.

It can be divided in two parts, 18093 and 998, that added together give a palindrome (19091).

The spelling of 18093998 in words is "eighteen million, ninety-three thousand, nine hundred ninety-eight".