20311331434312 has 32 divisors (see below), whose sum is σ = 38983780709280. Its totient is φ = 9915830709120.

The previous prime is 20311331434283. The next prime is 20311331434333. The reversal of 20311331434312 is 21343413311302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9948514 + ... + 11815057.

It is an arithmetic number, because the mean of its divisors is an integer number (1218243147165).

Almost surely, 2^{20311331434312} is an apocalyptic number.

It is an amenable number.

20311331434312 is a deficient number, since it is larger than the sum of its proper divisors (18672449274968).

20311331434312 is a wasteful number, since it uses less digits than its factorization.

20311331434312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21766333 (or 21766329 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 20311331434312 its reverse (21343413311302), we get a palindrome (41654744745614).

The spelling of 20311331434312 in words is "twenty trillion, three hundred eleven billion, three hundred thirty-one million, four hundred thirty-four thousand, three hundred twelve".