20203312303 has 4 divisors (see below), whose sum is σ = 20261201800. Its totient is φ = 20145422808.

The previous prime is 20203312271. The next prime is 20203312331. The reversal of 20203312303 is 30321330202.

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 20203312303 - 2⁵ = 20203312271 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 (20203312373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28944225 + ... + 28944922.

It is an arithmetic number, because the mean of its divisors is an integer number (5065300450).

Almost surely, 2^20203312303 is an apocalyptic number.

20203312303 is a deficient number, since it is larger than the sum of its proper divisors (57889497).

20203312303 is an equidigital number, since it uses as much as digits as its factorization.

20203312303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57889496.

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

Adding to 20203312303 its reverse (30321330202), we get a palindrome (50524642505).

The spelling of 20203312303 in words is "twenty billion, two hundred three million, three hundred twelve thousand, three hundred three".