20328593 has 4 divisors (see below), whose sum is σ = 20356068. Its totient is φ = 20301120.

The previous prime is 20328589. The next prime is 20328629. The reversal of 20328593 is 39582302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9193024 + 11135569 = 3032^2 + 3337^2 .

It is a cyclic number.

It is not a de Polignac number, because 20328593 - 2² = 20328589 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20328533) 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, 12596 + ... + 14117.

It is an arithmetic number, because the mean of its divisors is an integer number (5089017).

Almost surely, 2^20328593 is an apocalyptic number.

It is an amenable number.

20328593 is a deficient number, since it is larger than the sum of its proper divisors (27475).

20328593 is an equidigital number, since it uses as much as digits as its factorization.

20328593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27474.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20328593 is about 4508.7240988998. The cubic root of 20328593 is about 272.9202583008.

The spelling of 20328593 in words is "twenty million, three hundred twenty-eight thousand, five hundred ninety-three".