20045328 has 80 divisors (see below), whose sum is σ = 55044096. Its totient is φ = 6272640.

The previous prime is 20045327. The next prime is 20045339. The reversal of 20045328 is 82354002.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20045298 and 20045307.

It is not an unprimeable number, because it can be changed into a prime (20045321) 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, 73833 + ... + 74103.

Almost surely, 2^20045328 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 20045328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27522048).

20045328 is an abundant number, since it is smaller than the sum of its proper divisors (34998768).

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

20045328 is a wasteful number, since it uses less digits than its factorization.

20045328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20045328 is about 4477.2009112837. The cubic root of 20045328 is about 271.6466721372.

The spelling of 20045328 in words is "twenty million, forty-five thousand, three hundred twenty-eight".