20759728 has 30 divisors (see below), whose sum is σ = 44215052. Its totient is φ = 9435360.

The previous prime is 20759719. The next prime is 20759743. The reversal of 20759728 is 82795702.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3426 + ... + 7297.

Almost surely, 2^20759728 is an apocalyptic number.

It is an amenable number.

20759728 is an abundant number, since it is smaller than the sum of its proper divisors (23455324).

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

20759728 is a wasteful number, since it uses less digits than its factorization.

20759728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10753 (or 10736 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 20759728 is about 4556.2844511729. The cubic root of 20759728 is about 274.8361690840.

The spelling of 20759728 in words is "twenty million, seven hundred fifty-nine thousand, seven hundred twenty-eight".