20331205 has 8 divisors (see below), whose sum is σ = 24741504. Its totient is φ = 16035600.

The previous prime is 20331191. The next prime is 20331209. The reversal of 20331205 is 50213302.

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

It is not a de Polignac number, because 20331205 - 2⁹ = 20330693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331209) 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, 28281 + ... + 28990.

It is an arithmetic number, because the mean of its divisors is an integer number (3092688).

Almost surely, 2^20331205 is an apocalyptic number.

It is an amenable number.

20331205 is a deficient number, since it is larger than the sum of its proper divisors (4410299).

20331205 is an equidigital number, since it uses as much as digits as its factorization.

20331205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57347.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20331205 is about 4509.0137502563. The cubic root of 20331205 is about 272.9319468813.

Adding to 20331205 its reverse (50213302), we get a palindrome (70544507).

The spelling of 20331205 in words is "twenty million, three hundred thirty-one thousand, two hundred five".