23530220 has 48 divisors (see below), whose sum is σ = 56947968. Its totient is φ = 7999680.

The previous prime is 23530217. The next prime is 23530231. The reversal of 23530220 is 2203532.

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 15 ways as a sum of consecutive naturals, for example, 17699 + ... + 18981.

It is an arithmetic number, because the mean of its divisors is an integer number (1186416).

Almost surely, 2^23530220 is an apocalyptic number.

23530220 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 23530220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28473984).

23530220 is an abundant number, since it is smaller than the sum of its proper divisors (33417748).

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

23530220 is a wasteful number, since it uses less digits than its factorization.

23530220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 23530220 is about 4850.7958109984. The cubic root of 23530220 is about 286.5554433013. Note that the first 3 decimals are identical.

Adding to 23530220 its reverse (2203532), we get a palindrome (25733752).

The spelling of 23530220 in words is "twenty-three million, five hundred thirty thousand, two hundred twenty".