18685093 has 8 divisors (see below), whose sum is σ = 21704960. Its totient is φ = 15752880.

The previous prime is 18685087. The next prime is 18685099. The reversal of 18685093 is 39058681.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18685087) and next prime (18685099).

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

It is a cyclic number.

It is not a de Polignac number, because 18685093 - 2²¹ = 16587941 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 (18685099) 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, 21453 + ... + 22306.

It is an arithmetic number, because the mean of its divisors is an integer number (2713120).

Almost surely, 2^18685093 is an apocalyptic number.

It is an amenable number.

18685093 is a deficient number, since it is larger than the sum of its proper divisors (3019867).

18685093 is an equidigital number, since it uses as much as digits as its factorization.

18685093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43827.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18685093 is about 4322.6257066741. The cubic root of 18685093 is about 265.3577368628.

The spelling of 18685093 in words is "eighteen million, six hundred eighty-five thousand, ninety-three".