23316220 has 24 divisors (see below), whose sum is σ = 49518000. Its totient is φ = 9220992.

The previous prime is 23316157. The next prime is 23316229. The reversal of 23316220 is 2261332.

It is a super-2 number, since 2×23316220² = 1087292230176800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23316229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4770 + ... + 8329.

It is an arithmetic number, because the mean of its divisors is an integer number (2063250).

Almost surely, 2^23316220 is an apocalyptic number.

23316220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23316220 is an abundant number, since it is smaller than the sum of its proper divisors (26201780).

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

23316220 is a wasteful number, since it uses less digits than its factorization.

23316220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13197 (or 13195 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 23316220 is about 4828.6871921880. The cubic root of 23316220 is about 285.6840856175.

Adding to 23316220 its reverse (2261332), we get a palindrome (25577552).

The spelling of 23316220 in words is "twenty-three million, three hundred sixteen thousand, two hundred twenty".