20313231012 has 36 divisors (see below), whose sum is σ = 51536832256. Its totient is φ = 6746088240.

The previous prime is 20313230969. The next prime is 20313231073. The reversal of 20313231012 is 21013231302.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1031308 + ... + 1050819.

Almost surely, 2^20313231012 is an apocalyptic number.

It is an amenable number.

20313231012 is an abundant number, since it is smaller than the sum of its proper divisors (31223601244).

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

20313231012 is a wasteful number, since it uses less digits than its factorization.

20313231012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082408 (or 2082403 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20313231012 its reverse (21013231302), we get a palindrome (41326462314).

The spelling of 20313231012 in words is "twenty billion, three hundred thirteen million, two hundred thirty-one thousand, twelve".