20559328 has 24 divisors (see below), whose sum is σ = 41050800. Its totient is φ = 10133760.

The previous prime is 20559269. The next prime is 20559361. The reversal of 20559328 is 82395502.

It is a junction number, because it is equal to n+sod(n) for n = 20559293 and 20559302.

It is a congruent number.

It is an unprimeable number.

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, 2253 + ... + 6796.

It is an arithmetic number, because the mean of its divisors is an integer number (1710450).

Almost surely, 2^20559328 is an apocalyptic number.

It is an amenable number.

20559328 is a deficient number, since it is larger than the sum of its proper divisors (20491472).

20559328 is an equidigital number, since it uses as much as digits as its factorization.

20559328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9130 (or 9122 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 20559328 is about 4534.2395172730. The cubic root of 20559328 is about 273.9489488777.

The spelling of 20559328 in words is "twenty million, five hundred fifty-nine thousand, three hundred twenty-eight".