23201504520 has 128 divisors (see below), whose sum is σ = 72132508800. Its totient is φ = 5963116544.

The previous prime is 23201504519. The next prime is 23201504527. The reversal of 23201504520 is 2540510232.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (23201504527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2058019 + ... + 2069261.

It is an arithmetic number, because the mean of its divisors is an integer number (563535225).

Almost surely, 2^23201504520 is an apocalyptic number.

23201504520 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 23201504520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36066254400).

23201504520 is an abundant number, since it is smaller than the sum of its proper divisors (48931004280).

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

23201504520 is a wasteful number, since it uses less digits than its factorization.

23201504520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11879 (or 11875 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The spelling of 23201504520 in words is "twenty-three billion, two hundred one million, five hundred four thousand, five hundred twenty".