20566328 has 32 divisors (see below), whose sum is σ = 41277600. Its totient is φ = 9572352.

The previous prime is 20566267. The next prime is 20566331. The reversal of 20566328 is 82366502.

It is a junction number, because it is equal to n+sod(n) for n = 20566294 and 20566303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12413 + ... + 13971.

It is an arithmetic number, because the mean of its divisors is an integer number (1289925).

Almost surely, 2^20566328 is an apocalyptic number.

It is an amenable number.

20566328 is an abundant number, since it is smaller than the sum of its proper divisors (20711272).

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

20566328 is a wasteful number, since it uses less digits than its factorization.

20566328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679 (or 1675 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 20566328 is about 4535.0113561049. The cubic root of 20566328 is about 273.9800365514.

The spelling of 20566328 in words is "twenty million, five hundred sixty-six thousand, three hundred twenty-eight".