18093081 has 8 divisors (see below), whose sum is σ = 24189280. Its totient is φ = 12029472.

The previous prime is 18093079. The next prime is 18093107. The reversal of 18093081 is 18039081.

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

It is not a de Polignac number, because 18093081 - 2¹ = 18093079 is a prime.

It is a super-2 number, since 2×18093081² = 654719160145122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18093011) 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, 6820 + ... + 9093.

It is an arithmetic number, because the mean of its divisors is an integer number (3023660).

Almost surely, 2^18093081 is an apocalyptic number.

18093081 is the 2274-th nonagonal number.

It is an amenable number.

18093081 is a deficient number, since it is larger than the sum of its proper divisors (6096199).

18093081 is a wasteful number, since it uses less digits than its factorization.

18093081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16295.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 18093081 is about 4253.5962431806. The cubic root of 18093081 is about 262.5251059888.

The spelling of 18093081 in words is "eighteen million, ninety-three thousand, eighty-one".