20045568 has 72 divisors (see below), whose sum is σ = 54681088. Its totient is φ = 6515712.

The previous prime is 20045563. The next prime is 20045573. The reversal of 20045568 is 86554002.

It is an interprime number because it is at equal distance from previous prime (20045563) and next prime (20045573).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045563) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 32721 + ... + 33327.

Almost surely, 2^20045568 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 20045568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27340544).

20045568 is an abundant number, since it is smaller than the sum of its proper divisors (34635520).

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

20045568 is an equidigital number, since it uses as much as digits as its factorization.

20045568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 20045568 is about 4477.2277136639. The cubic root of 20045568 is about 271.6477562625.

The spelling of 20045568 in words is "twenty million, forty-five thousand, five hundred sixty-eight".