20171108764213 has 32 divisors (see below), whose sum is σ = 22411566747648. Its totient is φ = 18000414432000.

The previous prime is 20171108764207. The next prime is 20171108764231. The reversal of 20171108764213 is 31246780117102.

It is not a de Polignac number, because 20171108764213 - 2²⁹ = 20170571893301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20171108764213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20171108764813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 484547106 + ... + 484588732.

It is an arithmetic number, because the mean of its divisors is an integer number (700361460864).

Almost surely, 2^{20171108764213} is an apocalyptic number.

It is an amenable number.

20171108764213 is a deficient number, since it is larger than the sum of its proper divisors (2240457983435).

20171108764213 is a wasteful number, since it uses less digits than its factorization.

20171108764213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43993.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 20171108764213 in words is "twenty trillion, one hundred seventy-one billion, one hundred eight million, seven hundred sixty-four thousand, two hundred thirteen".