20328804 has 72 divisors (see below), whose sum is σ = 55429920. Its totient is φ = 6258432.

The previous prime is 20328793. The next prime is 20328811. The reversal of 20328804 is 40882302.

20328804 = T₃₇ + T₃₈ + ... + T₄₉₅.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 35827 + ... + 36389.

It is an arithmetic number, because the mean of its divisors is an integer number (769860).

Almost surely, 2^20328804 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 20328804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27714960).

20328804 is an abundant number, since it is smaller than the sum of its proper divisors (35101116).

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

20328804 is a wasteful number, since it uses less digits than its factorization.

20328804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20328804 is about 4508.7474979200. The cubic root of 20328804 is about 272.9212025533.

The spelling of 20328804 in words is "twenty million, three hundred twenty-eight thousand, eight hundred four".