18350521838385 has 32 divisors (see below), whose sum is σ = 32030791251840. Its totient is φ = 8897003404800.

The previous prime is 18350521838339. The next prime is 18350521838447. The reversal of 18350521838385 is 58383812505381.

It is not a de Polignac number, because 18350521838385 - 2³⁰ = 18349448096561 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5446125 + ... + 8146245.

It is an arithmetic number, because the mean of its divisors is an integer number (1000962226620).

Almost surely, 2^{18350521838385} is an apocalyptic number.

18350521838385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18350521838385 is a deficient number, since it is larger than the sum of its proper divisors (13680269413455).

18350521838385 is a wasteful number, since it uses less digits than its factorization.

18350521838385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741329.

The product of its (nonzero) digits is 27648000, while the sum is 60.

The spelling of 18350521838385 in words is "eighteen trillion, three hundred fifty billion, five hundred twenty-one million, eight hundred thirty-eight thousand, three hundred eighty-five".