20328584 has 16 divisors (see below), whose sum is σ = 38299920. Its totient is φ = 10115280.

The previous prime is 20328569. The next prime is 20328589. The reversal of 20328584 is 48582302.

It is a self number, because there is not a number n which added to its sum of digits gives 20328584.

It is not an unprimeable number, because it can be changed into a prime (20328589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4334 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (2393745).

Almost surely, 2^20328584 is an apocalyptic number.

It is an amenable number.

20328584 is a deficient number, since it is larger than the sum of its proper divisors (17971336).

20328584 is a wasteful number, since it uses less digits than its factorization.

20328584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12260 (or 12256 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 20328584 is about 4508.7231008346. The cubic root of 20328584 is about 272.9202180245.

The spelling of 20328584 in words is "twenty million, three hundred twenty-eight thousand, five hundred eighty-four".