20312311032 has 80 divisors (see below), whose sum is σ = 61269710040. Its totient is φ = 6249939264.

The previous prime is 20312311027. The next prime is 20312311087. The reversal of 20312311032 is 23011321302.

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

It is a junction number, because it is equal to n+sod(n) for n = 20312310996 and 20312311014.

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, 1197198 + ... + 1214045.

Almost surely, 2^20312311032 is an apocalyptic number.

It is an amenable number.

20312311032 is an abundant number, since it is smaller than the sum of its proper divisors (40957399008).

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

20312311032 is a wasteful number, since it uses less digits than its factorization.

20312311032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411274 (or 2411261 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20312311032 its reverse (23011321302), we get a palindrome (43323632334).

The spelling of 20312311032 in words is "twenty billion, three hundred twelve million, three hundred eleven thousand, thirty-two".