23180520 has 128 divisors (see below), whose sum is σ = 80403840. Its totient is φ = 5283840.

The previous prime is 23180519. The next prime is 23180543. The reversal of 23180520 is 2508132.

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, 21924 + ... + 22956.

It is an arithmetic number, because the mean of its divisors is an integer number (628155).

Almost surely, 2^23180520 is an apocalyptic number.

23180520 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 23180520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40201920).

23180520 is an abundant number, since it is smaller than the sum of its proper divisors (57223320).

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

23180520 is a wasteful number, since it uses less digits than its factorization.

23180520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 23180520 is about 4814.6152494254. The cubic root of 23180520 is about 285.1287814424.

Adding to 23180520 its reverse (2508132), we get a palindrome (25688652).

The spelling of 23180520 in words is "twenty-three million, one hundred eighty thousand, five hundred twenty".