20312641103245 has 16 divisors (see below), whose sum is σ = 25658393927040. Its totient is φ = 15394651210944.

The previous prime is 20312641103233. The next prime is 20312641103257. The reversal of 20312641103245 is 54230114621302.

It is an interprime number because it is at equal distance from previous prime (20312641103233) and next prime (20312641103257).

It is a de Polignac number, because none of the positive numbers 2^k-20312641103245 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20312641103245.

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, 6540199 + ... + 9132331.

It is an arithmetic number, because the mean of its divisors is an integer number (1603649620440).

Almost surely, 2^{20312641103245} is an apocalyptic number.

It is an amenable number.

20312641103245 is a deficient number, since it is larger than the sum of its proper divisors (5345752823795).

20312641103245 is a wasteful number, since it uses less digits than its factorization.

20312641103245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674644.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 20312641103245 its reverse (54230114621302), we get a palindrome (74542755724547).

The spelling of 20312641103245 in words is "twenty trillion, three hundred twelve billion, six hundred forty-one million, one hundred three thousand, two hundred forty-five".