20340203223 has 4 divisors (see below), whose sum is σ = 27120270968. Its totient is φ = 13560135480.

The previous prime is 20340203167. The next prime is 20340203239. The reversal of 20340203223 is 32230204302.

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

It is not a de Polignac number, because 20340203223 - 2⁹ = 20340202711 is a prime.

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 20340203223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340203263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3390033868 + ... + 3390033873.

It is an arithmetic number, because the mean of its divisors is an integer number (6780067742).

Almost surely, 2^20340203223 is an apocalyptic number.

20340203223 is a deficient number, since it is larger than the sum of its proper divisors (6780067745).

20340203223 is an equidigital number, since it uses as much as digits as its factorization.

20340203223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780067744.

The product of its (nonzero) digits is 1728, while the sum is 21.

Adding to 20340203223 its reverse (32230204302), we get a palindrome (52570407525).

The spelling of 20340203223 in words is "twenty billion, three hundred forty million, two hundred three thousand, two hundred twenty-three".