23120265520 has 160 divisors (see below), whose sum is σ = 62343509760. Its totient is φ = 7885440000.

The previous prime is 23120265461. The next prime is 23120265593. The reversal of 23120265520 is 2556202132.

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, 1681875 + ... + 1695565.

It is an arithmetic number, because the mean of its divisors is an integer number (389646936).

Almost surely, 2^23120265520 is an apocalyptic number.

23120265520 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 23120265520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31171754880).

23120265520 is an abundant number, since it is smaller than the sum of its proper divisors (39223244240).

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

23120265520 is a wasteful number, since it uses less digits than its factorization.

23120265520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13835 (or 13829 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 23120265520 its reverse (2556202132), we get a palindrome (25676467652).

The spelling of 23120265520 in words is "twenty-three billion, one hundred twenty million, two hundred sixty-five thousand, five hundred twenty".