23131320312 has 32 divisors (see below), whose sum is σ = 57946106880. Its totient is φ = 7694732640.

The previous prime is 23131320293. The next prime is 23131320361. The reversal of 23131320312 is 21302313132.

It is a congruent number.

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, 969688 + ... + 993255.

It is an arithmetic number, because the mean of its divisors is an integer number (1810815840).

Almost surely, 2^23131320312 is an apocalyptic number.

It is an amenable number.

23131320312 is an abundant number, since it is smaller than the sum of its proper divisors (34814786568).

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

23131320312 is a wasteful number, since it uses less digits than its factorization.

23131320312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963443 (or 1963439 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 23131320312 its reverse (21302313132), we get a palindrome (44433633444).

The spelling of 23131320312 in words is "twenty-three billion, one hundred thirty-one million, three hundred twenty thousand, three hundred twelve".