20310021103 has 4 divisors (see below), whose sum is σ = 20322235648. Its totient is φ = 20297806560.

The previous prime is 20310021077. The next prime is 20310021161. The reversal of 20310021103 is 30112001302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30112001302 = 2 ⋅15056000651.

It is a cyclic number.

It is not a de Polignac number, because 20310021103 - 2⁵ = 20310021071 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 (20310021203) 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, 6104778 + ... + 6108103.

It is an arithmetic number, because the mean of its divisors is an integer number (5080558912).

Almost surely, 2^20310021103 is an apocalyptic number.

20310021103 is a deficient number, since it is larger than the sum of its proper divisors (12214545).

20310021103 is a wasteful number, since it uses less digits than its factorization.

20310021103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12214544.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20310021103 its reverse (30112001302), we get a palindrome (50422022405).

The spelling of 20310021103 in words is "twenty billion, three hundred ten million, twenty-one thousand, one hundred three".