23689440823 has 4 divisors (see below), whose sum is σ = 25082937360. Its totient is φ = 22295944288.

The previous prime is 23689440821. The next prime is 23689440833. The reversal of 23689440823 is 32804498632.

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 23689440823 - 2¹ = 23689440821 is a prime.

It is a super-2 number, since 2×23689440823² (a number of 22 digits) contains 22 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 (23689440821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696748243 + ... + 696748276.

It is an arithmetic number, because the mean of its divisors is an integer number (6270734340).

Almost surely, 2^23689440823 is an apocalyptic number.

23689440823 is a deficient number, since it is larger than the sum of its proper divisors (1393496537).

23689440823 is a wasteful number, since it uses less digits than its factorization.

23689440823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393496536.

The product of its (nonzero) digits is 1990656, while the sum is 49.

The spelling of 23689440823 in words is "twenty-three billion, six hundred eighty-nine million, four hundred forty thousand, eight hundred twenty-three".