23521015808 has 48 divisors (see below), whose sum is σ = 47675103840. Its totient is φ = 11599331328.

The previous prime is 23521015807. The next prime is 23521015829. The reversal of 23521015808 is 80851012532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23521015807) 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, 70841 + ... + 228167.

It is an arithmetic number, because the mean of its divisors is an integer number (993231330).

Almost surely, 2^23521015808 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 23521015808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23837551920).

23521015808 is an abundant number, since it is smaller than the sum of its proper divisors (24154088032).

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

23521015808 is an equidigital number, since it uses as much as digits as its factorization.

23521015808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157422 (or 157402 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The spelling of 23521015808 in words is "twenty-three billion, five hundred twenty-one million, fifteen thousand, eight hundred eight".