31112300020 has 12 divisors (see below), whose sum is σ = 65335830084. Its totient is φ = 12444920000.

The previous prime is 31112299997. The next prime is 31112300027. The reversal of 31112300020 is 2000321113.

It can be written as a sum of positive squares in 2 ways, for example, as 10262095204 + 20850204816 = 101302^2 + 144396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112300027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777807481 + ... + 777807520.

It is an arithmetic number, because the mean of its divisors is an integer number (5444652507).

Almost surely, 2^31112300020 is an apocalyptic number.

It is an amenable number.

31112300020 is an abundant number, since it is smaller than the sum of its proper divisors (34223530064).

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

31112300020 is a wasteful number, since it uses less digits than its factorization.

31112300020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555615010 (or 1555615008 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31112300020 its reverse (2000321113), we get a palindrome (33112621133).

The spelling of 31112300020 in words is "thirty-one billion, one hundred twelve million, three hundred thousand, twenty".