20326389 has 4 divisors (see below), whose sum is σ = 27101856. Its totient is φ = 13550924.

The previous prime is 20326381. The next prime is 20326433. The reversal of 20326389 is 98362302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20326389 - 2³ = 20326381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20326381) 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, 3387729 + ... + 3387734.

It is an arithmetic number, because the mean of its divisors is an integer number (6775464).

Almost surely, 2^20326389 is an apocalyptic number.

It is an amenable number.

20326389 is a deficient number, since it is larger than the sum of its proper divisors (6775467).

20326389 is an equidigital number, since it uses as much as digits as its factorization.

20326389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775466.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 20326389 is about 4508.4796772305. The cubic root of 20326389 is about 272.9103947228.

The spelling of 20326389 in words is "twenty million, three hundred twenty-six thousand, three hundred eighty-nine".