20328105 has 16 divisors (see below), whose sum is σ = 37171584. Its totient is φ = 9292800.

The previous prime is 20328089. The next prime is 20328137. The reversal of 20328105 is 50182302.

It is not a de Polignac number, because 20328105 - 2⁴ = 20328089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 15 ways as a sum of consecutive naturals, for example, 96696 + ... + 96905.

It is an arithmetic number, because the mean of its divisors is an integer number (2323224).

Almost surely, 2^20328105 is an apocalyptic number.

It is an amenable number.

20328105 is a deficient number, since it is larger than the sum of its proper divisors (16843479).

20328105 is a wasteful number, since it uses less digits than its factorization.

20328105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193616.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20328105 is about 4508.6699812694. The cubic root of 20328105 is about 272.9180744121.

The spelling of 20328105 in words is "twenty million, three hundred twenty-eight thousand, one hundred five".