20404312303 has 4 divisors (see below), whose sum is σ = 20738809288. Its totient is φ = 20069815320.

The previous prime is 20404312297. The next prime is 20404312343. The reversal of 20404312303 is 30321340402.

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 20404312303 - 2⁹ = 20404311791 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 (20404312343) 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, 167248401 + ... + 167248522.

It is an arithmetic number, because the mean of its divisors is an integer number (5184702322).

Almost surely, 2^20404312303 is an apocalyptic number.

20404312303 is a deficient number, since it is larger than the sum of its proper divisors (334496985).

20404312303 is an equidigital number, since it uses as much as digits as its factorization.

20404312303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334496984.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20404312303 its reverse (30321340402), we get a palindrome (50725652705).

The spelling of 20404312303 in words is "twenty billion, four hundred four million, three hundred twelve thousand, three hundred three".