23808434581 has 4 divisors (see below), whose sum is σ = 23809581792. Its totient is φ = 23807287372.

The previous prime is 23808434579. The next prime is 23808434593. The reversal of 23808434581 is 18543480832.

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 a cyclic number.

It is not a de Polignac number, because 23808434581 - 2¹ = 23808434579 is a prime.

It is a super-2 number, since 2×23808434581² (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 (23808434281) 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, 541891 + ... + 584176.

It is an arithmetic number, because the mean of its divisors is an integer number (5952395448).

Almost surely, 2^23808434581 is an apocalyptic number.

It is an amenable number.

23808434581 is a deficient number, since it is larger than the sum of its proper divisors (1147211).

23808434581 is a wasteful number, since it uses less digits than its factorization.

23808434581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147210.

The product of its (nonzero) digits is 737280, while the sum is 46.

The spelling of 23808434581 in words is "twenty-three billion, eight hundred eight million, four hundred thirty-four thousand, five hundred eighty-one".