23181815808 has 312 divisors, whose sum is σ = 72037027296. Its totient is φ = 7156531200.

The previous prime is 23181815677. The next prime is 23181815843. The reversal of 23181815808 is 80851818132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44494588 + ... + 44495108.

It is an arithmetic number, because the mean of its divisors is an integer number (230887908).

Almost surely, 2^23181815808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23181815808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36018513648).

23181815808 is an abundant number, since it is smaller than the sum of its proper divisors (48855211488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23181815808 is a wasteful number, since it uses less digits than its factorization.

23181815808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 45.

The spelling of 23181815808 in words is "twenty-three billion, one hundred eighty-one million, eight hundred fifteen thousand, eight hundred eight".