20025728 has 32 divisors (see below), whose sum is σ = 42246360. Its totient is φ = 9422848.

The previous prime is 20025727. The next prime is 20025737. The reversal of 20025728 is 82752002.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 20025697 and 20025706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025727) 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, 2426 + ... + 6777.

Almost surely, 2^20025728 is an apocalyptic number.

It is an amenable number.

20025728 is an abundant number, since it is smaller than the sum of its proper divisors (22220632).

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

20025728 is an equidigital number, since it uses as much as digits as its factorization.

20025728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9234 (or 9222 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20025728 is about 4475.0115083651. The cubic root of 20025728 is about 271.5581060127.

The spelling of 20025728 in words is "twenty million, twenty-five thousand, seven hundred twenty-eight".