18085642 has 8 divisors (see below), whose sum is σ = 27148932. Its totient is φ = 9036000.

The previous prime is 18085631. The next prime is 18085649. The reversal of 18085642 is 24658081.

It can be written as a sum of positive squares in 2 ways, for example, as 18071001 + 14641 = 4251^2 + 121^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 18085598 and 18085607.

It is not an unprimeable number, because it can be changed into a prime (18085649) 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, 1092 + ... + 6112.

Almost surely, 2^18085642 is an apocalyptic number.

18085642 is a deficient number, since it is larger than the sum of its proper divisors (9063290).

18085642 is a wasteful number, since it uses less digits than its factorization.

18085642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6824.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 18085642 is about 4252.7217167362. The cubic root of 18085642 is about 262.4891218470.

The spelling of 18085642 in words is "eighteen million, eighty-five thousand, six hundred forty-two".