18805093 has 4 divisors (see below), whose sum is σ = 18846700. Its totient is φ = 18763488.

The previous prime is 18805069. The next prime is 18805097. The reversal of 18805093 is 39050881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8958049 + 9847044 = 2993^2 + 3138^2 .

It is a cyclic number.

It is not a de Polignac number, because 18805093 - 2²¹ = 16707941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18805097) 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, 20118 + ... + 21031.

It is an arithmetic number, because the mean of its divisors is an integer number (4711675).

Almost surely, 2^18805093 is an apocalyptic number.

It is an amenable number.

18805093 is a deficient number, since it is larger than the sum of its proper divisors (41607).

18805093 is an equidigital number, since it uses as much as digits as its factorization.

18805093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41606.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18805093 is about 4336.4839443955. The cubic root of 18805093 is about 265.9245880785.

The spelling of 18805093 in words is "eighteen million, eight hundred five thousand, ninety-three".