23173431812 has 12 divisors (see below), whose sum is σ = 40825677900. Its totient is φ = 11508952416.

The previous prime is 23173431811. The next prime is 23173431851. The reversal of 23173431812 is 21813437132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2164668676 + 21008763136 = 46526^2 + 144944^2 .

It is not an unprimeable number, because it can be changed into a prime (23173431811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19440203 + ... + 19441394.

It is an arithmetic number, because the mean of its divisors is an integer number (3402139825).

Almost surely, 2^23173431812 is an apocalyptic number.

It is an amenable number.

23173431812 is a deficient number, since it is larger than the sum of its proper divisors (17652246088).

23173431812 is a wasteful number, since it uses less digits than its factorization.

23173431812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38881750 (or 38881748 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

Adding to 23173431812 its reverse (21813437132), we get a palindrome (44986868944).

The spelling of 23173431812 in words is "twenty-three billion, one hundred seventy-three million, four hundred thirty-one thousand, eight hundred twelve".