18093985 has 72 divisors (see below), whose sum is σ = 30041280. Its totient is φ = 10378368.

The previous prime is 18093983. The next prime is 18093991. The reversal of 18093985 is 58939081.

It is not a de Polignac number, because 18093985 - 2¹ = 18093983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18093983) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 786684 + ... + 786706.

It is an arithmetic number, because the mean of its divisors is an integer number (417240).

Almost surely, 2^18093985 is an apocalyptic number.

It is an amenable number.

18093985 is a deficient number, since it is larger than the sum of its proper divisors (11947295).

18093985 is a wasteful number, since it uses less digits than its factorization.

18093985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 18093985 is about 4253.7025048774. The cubic root of 18093985 is about 262.5294781710.

The spelling of 18093985 in words is "eighteen million, ninety-three thousand, nine hundred eighty-five".