20051328 has 128 divisors (see below), whose sum is σ = 59927040. Its totient is φ = 5888000.

The previous prime is 20051309. The next prime is 20051329. The reversal of 20051328 is 82315002.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20051329) 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 15 ways as a sum of consecutive naturals, for example, 198478 + ... + 198578.

It is an arithmetic number, because the mean of its divisors is an integer number (468180).

Almost surely, 2^20051328 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 20051328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29963520).

20051328 is an abundant number, since it is smaller than the sum of its proper divisors (39875712).

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

20051328 is a wasteful number, since it uses less digits than its factorization.

20051328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20051328 is about 4477.8709226596. The cubic root of 20051328 is about 271.6737726739.

It can be divided in two parts, 2005 and 1328, that added together give a palindrome (3333).

The spelling of 20051328 in words is "twenty million, fifty-one thousand, three hundred twenty-eight".