20323120303 has 4 divisors (see below), whose sum is σ = 20344051368. Its totient is φ = 20302189240.

The previous prime is 20323120291. The next prime is 20323120319. The reversal of 20323120303 is 30302132302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20323120303 - 2²⁵ = 20289565871 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 (20323120703) 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, 10464076 + ... + 10466017.

It is an arithmetic number, because the mean of its divisors is an integer number (5086012842).

Almost surely, 2^20323120303 is an apocalyptic number.

20323120303 is a deficient number, since it is larger than the sum of its proper divisors (20931065).

20323120303 is an equidigital number, since it uses as much as digits as its factorization.

20323120303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20931064.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20323120303 its reverse (30302132302), we get a palindrome (50625252605).

The spelling of 20323120303 in words is "twenty billion, three hundred twenty-three million, one hundred twenty thousand, three hundred three".