20328956 has 12 divisors (see below), whose sum is σ = 35632968. Its totient is φ = 10148112.

The previous prime is 20328953. The next prime is 20328983. The reversal of 20328956 is 65982302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20328953) 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, 1046 + ... + 6461.

It is an arithmetic number, because the mean of its divisors is an integer number (2969414).

Almost surely, 2^20328956 is an apocalyptic number.

It is an amenable number.

20328956 is a deficient number, since it is larger than the sum of its proper divisors (15304012).

20328956 is a wasteful number, since it uses less digits than its factorization.

20328956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8188 (or 8186 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20328956 is about 4508.7643540110. The cubic root of 20328956 is about 272.9218827691.

The spelling of 20328956 in words is "twenty million, three hundred twenty-eight thousand, nine hundred fifty-six".