23138879471 has 4 divisors (see below), whose sum is σ = 23139597912. Its totient is φ = 23138161032.

The previous prime is 23138879447. The next prime is 23138879479. The reversal of 23138879471 is 17497883132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23138879471 - 2¹⁰ = 23138878447 is a prime.

It is a super-3 number, since 3×23138879471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23138879479) 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, 308525 + ... + 376118.

It is an arithmetic number, because the mean of its divisors is an integer number (5784899478).

Almost surely, 2^23138879471 is an apocalyptic number.

23138879471 is a deficient number, since it is larger than the sum of its proper divisors (718441).

23138879471 is an equidigital number, since it uses as much as digits as its factorization.

23138879471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718440.

The product of its digits is 2032128, while the sum is 53.

The spelling of 23138879471 in words is "twenty-three billion, one hundred thirty-eight million, eight hundred seventy-nine thousand, four hundred seventy-one".