20328259 has 8 divisors (see below), whose sum is σ = 23308128. Its totient is φ = 17367360.

The previous prime is 20328257. The next prime is 20328307. The reversal of 20328259 is 95282302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20328259 - 2¹ = 20328257 is a prime.

It is a super-2 number, since 2×20328259² = 826476227942162, which contains 22 as substring.

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 20328259.

It is not an unprimeable number, because it can be changed into a prime (20328257) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2362 + ... + 6799.

It is an arithmetic number, because the mean of its divisors is an integer number (2913516).

Almost surely, 2^20328259 is an apocalyptic number.

20328259 is a deficient number, since it is larger than the sum of its proper divisors (2979869).

20328259 is an equidigital number, since it uses as much as digits as its factorization.

20328259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9485.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20328259 is about 4508.6870594442. The cubic root of 20328259 is about 272.9187635939.

The spelling of 20328259 in words is "twenty million, three hundred twenty-eight thousand, two hundred fifty-nine".