20568424 has 16 divisors (see below), whose sum is σ = 39896100. Its totient is φ = 9929472.

The previous prime is 20568421. The next prime is 20568451. The reversal of 20568424 is 42486502.

It can be written as a sum of positive squares in 2 ways, for example, as 20520900 + 47524 = 4530^2 + 218^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20568421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44097 + ... + 44560.

Almost surely, 2^20568424 is an apocalyptic number.

It is an amenable number.

20568424 is a deficient number, since it is larger than the sum of its proper divisors (19327676).

20568424 is a wasteful number, since it uses less digits than its factorization.

20568424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88692 (or 88688 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 20568424 is about 4535.2424411491. The cubic root of 20568424 is about 273.9893437168.

The spelling of 20568424 in words is "twenty million, five hundred sixty-eight thousand, four hundred twenty-four".