23528570520 has 256 divisors, whose sum is σ = 91985725440. Its totient is φ = 4672217088.

The previous prime is 23528570489. The next prime is 23528570563. The reversal of 23528570520 is 2507582532.

It is a super-2 number, since 2×23528570520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 122269 + ... + 249011.

It is an arithmetic number, because the mean of its divisors is an integer number (359319240).

Almost surely, 2^23528570520 is an apocalyptic number.

23528570520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23528570520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45992862720).

23528570520 is an abundant number, since it is smaller than the sum of its proper divisors (68457154920).

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

23528570520 is a wasteful number, since it uses less digits than its factorization.

23528570520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126794 (or 126790 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 39.

The spelling of 23528570520 in words is "twenty-three billion, five hundred twenty-eight million, five hundred seventy thousand, five hundred twenty".