20311313112 has 80 divisors (see below), whose sum is σ = 56913216360. Its totient is φ = 6767732736.

The previous prime is 20311313081. The next prime is 20311313147. The reversal of 20311313112 is 21131311302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2235603 + ... + 2244669.

Almost surely, 2^20311313112 is an apocalyptic number.

It is an amenable number.

20311313112 is an abundant number, since it is smaller than the sum of its proper divisors (36601903248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311313112 is a wasteful number, since it uses less digits than its factorization.

20311313112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12542 (or 12529 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 20311313112 its reverse (21131311302), we get a palindrome (41442624414).

It can be divided in two parts, 203113 and 13112, that added together give a square (216225 = 465²).

The spelling of 20311313112 in words is "twenty billion, three hundred eleven million, three hundred thirteen thousand, one hundred twelve".