20311331103 has 24 divisors (see below), whose sum is σ = 33954252800. Its totient is φ = 11459554704.

The previous prime is 20311331093. The next prime is 20311331123. The reversal of 20311331103 is 30113311302.

It is a happy number.

20311331103 is a `hidden beast` number, since 20 + 311 + 331 + 1 + 0 + 3 = 666.

It is not a de Polignac number, because 20311331103 - 2⁹ = 20311330591 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 (20311331123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2035543 + ... + 2045496.

Almost surely, 2^20311331103 is an apocalyptic number.

20311331103 is a deficient number, since it is larger than the sum of its proper divisors (13642921697).

20311331103 is a wasteful number, since it uses less digits than its factorization.

20311331103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081131 (or 4081128 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 20311331103 its reverse (30113311302), we get a palindrome (50424642405).

The spelling of 20311331103 in words is "twenty billion, three hundred eleven million, three hundred thirty-one thousand, one hundred three".