23243520 has 72 divisors (see below), whose sum is σ = 74246256. Its totient is φ = 6197248.

The previous prime is 23243497. The next prime is 23243543. The reversal of 23243520 is 2534232.

It is an interprime number because it is at equal distance from previous prime (23243497) and next prime (23243543).

It is a super-2 number, since 2×23243520² = 1080522443980800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814 + ... + 6866.

It is an arithmetic number, because the mean of its divisors is an integer number (1031198).

Almost surely, 2^23243520 is an apocalyptic number.

23243520 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 23243520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37123128).

23243520 is an abundant number, since it is smaller than the sum of its proper divisors (51002736).

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

23243520 is an equidigital number, since it uses as much as digits as its factorization.

23243520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6077 (or 6063 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 23243520 is about 4821.1533889724. The cubic root of 23243520 is about 285.3868553824.

Adding to 23243520 its reverse (2534232), we get a palindrome (25777752).

The spelling of 23243520 in words is "twenty-three million, two hundred forty-three thousand, five hundred twenty".