20313013312 has 28 divisors (see below), whose sum is σ = 42679734300. Its totient is φ = 9559064576.

The previous prime is 20313013271. The next prime is 20313013351. The reversal of 20313013312 is 21331031302.

It can be written as a sum of positive squares in 2 ways, for example, as 17481070656 + 2831942656 = 132216^2 + 53216^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20313013312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9333937 + ... + 9336112.

It is an arithmetic number, because the mean of its divisors is an integer number (1524276225).

Almost surely, 2^20313013312 is an apocalyptic number.

It is an amenable number.

20313013312 is an abundant number, since it is smaller than the sum of its proper divisors (22366720988).

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

20313013312 is a wasteful number, since it uses less digits than its factorization.

20313013312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18670078 (or 18670068 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20313013312 its reverse (21331031302), we get a palindrome (41644044614).

The spelling of 20313013312 in words is "twenty billion, three hundred thirteen million, thirteen thousand, three hundred twelve".