18685734 has 8 divisors (see below), whose sum is σ = 37371480. Its totient is φ = 6228576.

The previous prime is 18685727. The next prime is 18685739. The reversal of 18685734 is 43758681.

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

18685734 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18685739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1557139 + ... + 1557150.

It is an arithmetic number, because the mean of its divisors is an integer number (4671435).

Almost surely, 2^18685734 is an apocalyptic number.

18685734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18685734 is a wasteful number, since it uses less digits than its factorization.

18685734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114294.

The product of its digits is 161280, while the sum is 42.

The square root of 18685734 is about 4322.6998507877. The cubic root of 18685734 is about 265.3607712311.

The spelling of 18685734 in words is "eighteen million, six hundred eighty-five thousand, seven hundred thirty-four".