20311230012 has 48 divisors (see below), whose sum is σ = 50193561600. Its totient is φ = 6370515712.

The previous prime is 20311229947. The next prime is 20311230019. The reversal of 20311230012 is 21003211302.

It is a junction number, because it is equal to n+sod(n) for n = 20311229973 and 20311230000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311230019) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 968623 + ... + 989369.

It is an arithmetic number, because the mean of its divisors is an integer number (1045699200).

Almost surely, 2^20311230012 is an apocalyptic number.

It is an amenable number.

20311230012 is an abundant number, since it is smaller than the sum of its proper divisors (29882331588).

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

20311230012 is a wasteful number, since it uses less digits than its factorization.

20311230012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25570 (or 25568 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20311230012 its reverse (21003211302), we get a palindrome (41314441314).

The spelling of 20311230012 in words is "twenty billion, three hundred eleven million, two hundred thirty thousand, twelve".