20328292 has 12 divisors (see below), whose sum is σ = 36442476. Its totient is φ = 9916160.

The previous prime is 20328257. The next prime is 20328307. The reversal of 20328292 is 29282302.

It can be written as a sum of positive squares in 2 ways, for example, as 11999296 + 8328996 = 3464^2 + 2886^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20328292.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61813 + ... + 62140.

It is an arithmetic number, because the mean of its divisors is an integer number (3036873).

Almost surely, 2^20328292 is an apocalyptic number.

It is an amenable number.

20328292 is a deficient number, since it is larger than the sum of its proper divisors (16114184).

20328292 is a wasteful number, since it uses less digits than its factorization.

20328292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123998 (or 123996 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20328292 is about 4508.6907190447. The cubic root of 20328292 is about 272.9189112752.

The spelling of 20328292 in words is "twenty million, three hundred twenty-eight thousand, two hundred ninety-two".