18408093 has 48 divisors (see below), whose sum is σ = 30260160. Its totient is φ = 9884160.

The previous prime is 18408083. The next prime is 18408101. The reversal of 18408093 is 39080481.

It is not a de Polignac number, because 18408093 - 2⁴ = 18408077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18408023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117171 + ... + 117327.

It is an arithmetic number, because the mean of its divisors is an integer number (630420).

Almost surely, 2^18408093 is an apocalyptic number.

It is an amenable number.

18408093 is a deficient number, since it is larger than the sum of its proper divisors (11852067).

18408093 is a wasteful number, since it uses less digits than its factorization.

18408093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18408093 is about 4290.4653593754. The cubic root of 18408093 is about 264.0399245175.

The spelling of 18408093 in words is "eighteen million, four hundred eight thousand, ninety-three".