23505543520 has 48 divisors (see below), whose sum is σ = 57032721648. Its totient is φ = 9148101120.

The previous prime is 23505543497. The next prime is 23505543547. The reversal of 23505543520 is 2534550532.

It is a super-2 number, since 2×23505543520² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1979346 + ... + 1991185.

It is an arithmetic number, because the mean of its divisors is an integer number (1188181701).

Almost surely, 2^23505543520 is an apocalyptic number.

23505543520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23505543520 is an abundant number, since it is smaller than the sum of its proper divisors (33527178128).

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

23505543520 is a wasteful number, since it uses less digits than its factorization.

23505543520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970583 (or 3970575 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 34.

The spelling of 23505543520 in words is "twenty-three billion, five hundred five million, five hundred forty-three thousand, five hundred twenty".