23545981808 has 40 divisors (see below), whose sum is σ = 46291690416. Its totient is φ = 11600064000.

The previous prime is 23545981807. The next prime is 23545981829. The reversal of 23545981808 is 80818954532.

It is a Cunningham number, because it is equal to 153447²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 23545981808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23545981807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217978 + ... + 1237158.

Almost surely, 2^23545981808 is an apocalyptic number.

It is an amenable number.

23545981808 is a deficient number, since it is larger than the sum of its proper divisors (22745708608).

23545981808 is a wasteful number, since it uses less digits than its factorization.

23545981808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20313 (or 20307 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 53.

The spelling of 23545981808 in words is "twenty-three billion, five hundred forty-five million, nine hundred eighty-one thousand, eight hundred eight".