18338840085 has 16 divisors (see below), whose sum is σ = 29356240320. Its totient is φ = 9776016000.

The previous prime is 18338840053. The next prime is 18338840101. The reversal of 18338840085 is 58004883381.

It is not a de Polignac number, because 18338840085 - 2⁵ = 18338840053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261291 + ... + 323960.

It is an arithmetic number, because the mean of its divisors is an integer number (1834765020).

Almost surely, 2^18338840085 is an apocalyptic number.

18338840085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18338840085 is a deficient number, since it is larger than the sum of its proper divisors (11017400235).

18338840085 is a wasteful number, since it uses less digits than its factorization.

18338840085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587348.

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 18338840085 in words is "eighteen billion, three hundred thirty-eight million, eight hundred forty thousand, eighty-five".