20560128 has 72 divisors (see below), whose sum is σ = 57640800. Its totient is φ = 6488064.

The previous prime is 20560121. The next prime is 20560129. The reversal of 20560128 is 82106502.

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 = 20560098 and 20560107.

It is not an unprimeable number, because it can be changed into a prime (20560121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13888 + ... + 15296.

Almost surely, 2^20560128 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 20560128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28820400).

20560128 is an abundant number, since it is smaller than the sum of its proper divisors (37080672).

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

20560128 is a wasteful number, since it uses less digits than its factorization.

20560128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447 (or 1433 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 20560128 is about 4534.3277340748. The cubic root of 20560128 is about 273.9525021118.

The spelling of 20560128 in words is "twenty million, five hundred sixty thousand, one hundred twenty-eight".