20085173506365 has 16 divisors (see below), whose sum is σ = 35057757393216. Its totient is φ = 9738265942400.

The previous prime is 20085173506361. The next prime is 20085173506393. The reversal of 20085173506365 is 56360537158002.

It is not a de Polignac number, because 20085173506365 - 2² = 20085173506361 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20085173506361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60864161976 + ... + 60864162305.

It is an arithmetic number, because the mean of its divisors is an integer number (2191109837076).

Almost surely, 2^{20085173506365} is an apocalyptic number.

It is an amenable number.

20085173506365 is a deficient number, since it is larger than the sum of its proper divisors (14972583886851).

20085173506365 is a wasteful number, since it uses less digits than its factorization.

20085173506365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121728324300.

The product of its (nonzero) digits is 4536000, while the sum is 51.

The spelling of 20085173506365 in words is "twenty trillion, eighty-five billion, one hundred seventy-three million, five hundred six thousand, three hundred sixty-five".