23291898638 has 16 divisors (see below), whose sum is σ = 37770648720. Its totient is φ = 10734814656.

The previous prime is 23291898631. The next prime is 23291898653. The reversal of 23291898638 is 83689819232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23291898631) 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 7 ways as a sum of consecutive naturals, for example, 8281631 + ... + 8284442.

It is an arithmetic number, because the mean of its divisors is an integer number (2360665545).

Almost surely, 2^23291898638 is an apocalyptic number.

23291898638 is a deficient number, since it is larger than the sum of its proper divisors (14478750082).

23291898638 is a wasteful number, since it uses less digits than its factorization.

23291898638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16566131.

The product of its digits is 8957952, while the sum is 59.

The spelling of 23291898638 in words is "twenty-three billion, two hundred ninety-one million, eight hundred ninety-eight thousand, six hundred thirty-eight".