23663220 has 96 divisors (see below), whose sum is σ = 76597248. Its totient is φ = 5346432.

The previous prime is 23663219. The next prime is 23663243. The reversal of 23663220 is 2236632.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42987 + ... + 43533.

It is an arithmetic number, because the mean of its divisors is an integer number (797888).

Almost surely, 2^23663220 is an apocalyptic number.

23663220 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 23663220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38298624).

23663220 is an abundant number, since it is smaller than the sum of its proper divisors (52934028).

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

23663220 is a wasteful number, since it uses less digits than its factorization.

23663220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 23663220 is about 4864.4855843141. The cubic root of 23663220 is about 287.0943289265.

Adding to 23663220 its reverse (2236632), we get a palindrome (25899852).

The spelling of 23663220 in words is "twenty-three million, six hundred sixty-three thousand, two hundred twenty".