23945972520 has 128 divisors (see below), whose sum is σ = 75343530240. Its totient is φ = 6076815360.

The previous prime is 23945972509. The next prime is 23945972581. The reversal of 23945972520 is 2527954932.

It is a self number, because there is not a number n which added to its sum of digits gives 23945972520.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 521700 + ... + 565740.

It is an arithmetic number, because the mean of its divisors is an integer number (588621330).

Almost surely, 2^23945972520 is an apocalyptic number.

23945972520 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 23945972520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37671765120).

23945972520 is an abundant number, since it is smaller than the sum of its proper divisors (51397557720).

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

23945972520 is a wasteful number, since it uses less digits than its factorization.

23945972520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44275 (or 44271 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 23945972520 in words is "twenty-three billion, nine hundred forty-five million, nine hundred seventy-two thousand, five hundred twenty".