20728352 has 24 divisors (see below), whose sum is σ = 41504400. Its totient is φ = 10187584.

The previous prime is 20728339. The next prime is 20728387. The reversal of 20728352 is 25382702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3602 + ... + 7377.

It is an arithmetic number, because the mean of its divisors is an integer number (1729350).

Almost surely, 2^20728352 is an apocalyptic number.

It is an amenable number.

20728352 is an abundant number, since it is smaller than the sum of its proper divisors (20776048).

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

20728352 is a wasteful number, since it uses less digits than its factorization.

20728352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11048 (or 11040 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20728352 is about 4552.8399927957. The cubic root of 20728352 is about 274.6976379231.

The spelling of 20728352 in words is "twenty million, seven hundred twenty-eight thousand, three hundred fifty-two".