20311331012 has 12 divisors (see below), whose sum is σ = 40622662080. Its totient is φ = 8704856136.

The previous prime is 20311330993. The next prime is 20311331023. The reversal of 20311331012 is 21013311302.

20311331012 is an admirable number.

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, 362702312 + ... + 362702367.

It is an arithmetic number, because the mean of its divisors is an integer number (3385221840).

Almost surely, 2^20311331012 is an apocalyptic number.

It is an amenable number.

20311331012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20311331012 is a wasteful number, since it uses less digits than its factorization.

20311331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725404690 (or 725404688 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20311331012 its reverse (21013311302), we get a palindrome (41324642314).

The spelling of 20311331012 in words is "twenty billion, three hundred eleven million, three hundred thirty-one thousand, twelve".