31301322020 has 24 divisors (see below), whose sum is σ = 65747379768. Its totient is φ = 12517747200.

The previous prime is 31301321951. The next prime is 31301322043. The reversal of 31301322020 is 2022310313.

It can be written as a sum of positive squares in 4 ways, for example, as 79138816 + 31222183204 = 8896^2 + 176698^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31301322020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80351 + ... + 262790.

It is an arithmetic number, because the mean of its divisors is an integer number (2739474157).

Almost surely, 2^31301322020 is an apocalyptic number.

It is an amenable number.

31301322020 is an abundant number, since it is smaller than the sum of its proper divisors (34446057748).

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

31301322020 is a wasteful number, since it uses less digits than its factorization.

31301322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347711 (or 347709 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31301322020 its reverse (2022310313), we get a palindrome (33323632333).

The spelling of 31301322020 in words is "thirty-one billion, three hundred one million, three hundred twenty-two thousand, twenty".