20328123 has 4 divisors (see below), whose sum is σ = 27104168. Its totient is φ = 13552080.

The previous prime is 20328089. The next prime is 20328137. The reversal of 20328123 is 32182302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20328123 - 2¹³ = 20319931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20328123.

It is not an unprimeable number, because it can be changed into a prime (20328163) 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, 3388018 + ... + 3388023.

It is an arithmetic number, because the mean of its divisors is an integer number (6776042).

Almost surely, 2^20328123 is an apocalyptic number.

20328123 is a deficient number, since it is larger than the sum of its proper divisors (6776045).

20328123 is an equidigital number, since it uses as much as digits as its factorization.

20328123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776044.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20328123 is about 4508.6719774231. The cubic root of 20328123 is about 272.9181549660.

The spelling of 20328123 in words is "twenty million, three hundred twenty-eight thousand, one hundred twenty-three".