20331312103 has 4 divisors (see below), whose sum is σ = 20337730960. Its totient is φ = 20324893248.

The previous prime is 20331312097. The next prime is 20331312119. The reversal of 20331312103 is 30121313302.

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 20331312103 - 2²⁵ = 20297757671 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 (20331312173) 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, 3204675 + ... + 3211012.

It is an arithmetic number, because the mean of its divisors is an integer number (5084432740).

Almost surely, 2^20331312103 is an apocalyptic number.

20331312103 is a deficient number, since it is larger than the sum of its proper divisors (6418857).

20331312103 is an equidigital number, since it uses as much as digits as its factorization.

20331312103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6418856.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20331312103 its reverse (30121313302), we get a palindrome (50452625405).

The spelling of 20331312103 in words is "twenty billion, three hundred thirty-one million, three hundred twelve thousand, one hundred three".