23138504877 has 4 divisors (see below), whose sum is σ = 30851339840. Its totient is φ = 15425669916.

The previous prime is 23138504843. The next prime is 23138504887. The reversal of 23138504877 is 77840583132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23138504877 - 2⁶ = 23138504813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23138504887) 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, 3856417477 + ... + 3856417482.

It is an arithmetic number, because the mean of its divisors is an integer number (7712834960).

Almost surely, 2^23138504877 is an apocalyptic number.

It is an amenable number.

23138504877 is a deficient number, since it is larger than the sum of its proper divisors (7712834963).

23138504877 is an equidigital number, since it uses as much as digits as its factorization.

23138504877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712834962.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 23138504877 in words is "twenty-three billion, one hundred thirty-eight million, five hundred four thousand, eight hundred seventy-seven".