20403103211 has 4 divisors (see below), whose sum is σ = 20403424800. Its totient is φ = 20402781624.

The previous prime is 20403103169. The next prime is 20403103247. The reversal of 20403103211 is 11230130402.

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 20403103211 - 2¹⁴ = 20403086827 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 20403103211.

It is not an unprimeable number, because it can be changed into a prime (20403103261) 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, 30356 + ... + 204273.

It is an arithmetic number, because the mean of its divisors is an integer number (5100856200).

Almost surely, 2^20403103211 is an apocalyptic number.

20403103211 is a deficient number, since it is larger than the sum of its proper divisors (321589).

20403103211 is an equidigital number, since it uses as much as digits as its factorization.

20403103211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321588.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20403103211 its reverse (11230130402), we get a palindrome (31633233613).

The spelling of 20403103211 in words is "twenty billion, four hundred three million, one hundred three thousand, two hundred eleven".