18685375368535 has 16 divisors (see below), whose sum is σ = 22646153424960. Its totient is φ = 14799242016000.

The previous prime is 18685375368523. The next prime is 18685375368601. The reversal of 18685375368535 is 53586357358681.

It is not a de Polignac number, because 18685375368535 - 2⁴¹ = 16486352112983 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, 2872216 + ... + 6754285.

It is an arithmetic number, because the mean of its divisors is an integer number (1415384589060).

Almost surely, 2^{18685375368535} is an apocalyptic number.

18685375368535 is a deficient number, since it is larger than the sum of its proper divisors (3960778056425).

18685375368535 is a wasteful number, since it uses less digits than its factorization.

18685375368535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9630378.

The product of its digits is 2177280000, while the sum is 73.

The spelling of 18685375368535 in words is "eighteen trillion, six hundred eighty-five billion, three hundred seventy-five million, three hundred sixty-eight thousand, five hundred thirty-five".