23173938639 has 48 divisors (see below), whose sum is σ = 36151315200. Its totient is φ = 14260071168.

The previous prime is 23173938607. The next prime is 23173938691. The reversal of 23173938639 is 93683937132.

It is not a de Polignac number, because 23173938639 - 2⁵ = 23173938607 is a prime.

It is a super-3 number, since 3×23173938639³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23173938439) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1129894 + ... + 1150220.

It is an arithmetic number, because the mean of its divisors is an integer number (753152400).

Almost surely, 2^23173938639 is an apocalyptic number.

23173938639 is a deficient number, since it is larger than the sum of its proper divisors (12977376561).

23173938639 is a wasteful number, since it uses less digits than its factorization.

23173938639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20524 (or 20521 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The spelling of 23173938639 in words is "twenty-three billion, one hundred seventy-three million, nine hundred thirty-eight thousand, six hundred thirty-nine".