20254728 has 32 divisors (see below), whose sum is σ = 54532800. Its totient is φ = 6232128.

The previous prime is 20254723. The next prime is 20254733. The reversal of 20254728 is 82745202.

It is an interprime number because it is at equal distance from previous prime (20254723) and next prime (20254733).

It is a junction number, because it is equal to n+sod(n) for n = 20254695 and 20254704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20254723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32148 + ... + 32771.

It is an arithmetic number, because the mean of its divisors is an integer number (1704150).

Almost surely, 2^20254728 is an apocalyptic number.

It is an amenable number.

20254728 is an abundant number, since it is smaller than the sum of its proper divisors (34278072).

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

20254728 is a wasteful number, since it uses less digits than its factorization.

20254728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64941 (or 64937 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20254728 is about 4500.5253026730. The cubic root of 20254728 is about 272.5893004745.

The spelling of 20254728 in words is "twenty million, two hundred fifty-four thousand, seven hundred twenty-eight".