31320110020 has 48 divisors (see below), whose sum is σ = 67588844400. Its totient is φ = 12182413824.

The previous prime is 31320109969. The next prime is 31320110033. The reversal of 31320110020 is 2001102313.

It can be written as a sum of positive squares in 8 ways, for example, as 9015882304 + 22304227716 = 94952^2 + 149346^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1377706 + ... + 1400254.

It is an arithmetic number, because the mean of its divisors is an integer number (1408100925).

Almost surely, 2^31320110020 is an apocalyptic number.

It is an amenable number.

31320110020 is an abundant number, since it is smaller than the sum of its proper divisors (36268734380).

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

31320110020 is a wasteful number, since it uses less digits than its factorization.

31320110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24472 (or 24470 counting only the distinct ones).

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

Adding to 31320110020 its reverse (2001102313), we get a palindrome (33321212333).

The spelling of 31320110020 in words is "thirty-one billion, three hundred twenty million, one hundred ten thousand, twenty".