31320300020 has 48 divisors (see below), whose sum is σ = 66030930000. Its totient is φ = 12479001600.

The previous prime is 31320300007. The next prime is 31320300031. The reversal of 31320300020 is 2000302313.

It can be written as a sum of positive squares in 8 ways, for example, as 12348543376 + 18971756644 = 111124^2 + 137738^2 .

It is a super-2 number, since 2×31320300020² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31320299968 and 31320300004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9079256 + ... + 9082704.

It is an arithmetic number, because the mean of its divisors is an integer number (1375644375).

Almost surely, 2^31320300020 is an apocalyptic number.

It is an amenable number.

31320300020 is an abundant number, since it is smaller than the sum of its proper divisors (34710629980).

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

31320300020 is a wasteful number, since it uses less digits than its factorization.

31320300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108 (or 5106 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

Adding to 31320300020 its reverse (2000302313), we get a palindrome (33320602333).

The spelling of 31320300020 in words is "thirty-one billion, three hundred twenty million, three hundred thousand, twenty".