23021568 has 72 divisors (see below), whose sum is σ = 66543750. Its totient is φ = 7667712.

The previous prime is 23021567. The next prime is 23021639. The reversal of 23021568 is 86512032.

It can be written as a sum of positive squares in only one way, i.e., 20358144 + 2663424 = 4512^2 + 1632^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a zygodrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (23021567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17808 + ... + 19056.

Almost surely, 2^23021568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23021568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33271875).

23021568 is an abundant number, since it is smaller than the sum of its proper divisors (43522182).

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

23021568 is a wasteful number, since it uses less digits than its factorization.

23021568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1254 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 23021568 is about 4798.0796158463. The cubic root of 23021568 is about 284.4755637249.

The spelling of 23021568 in words is "twenty-three million, twenty-one thousand, five hundred sixty-eight".