20013031102103 has 4 divisors (see below), whose sum is σ = 21552495033048. Its totient is φ = 18473567171160.

The previous prime is 20013031102079. The next prime is 20013031102153. The reversal of 20013031102103 is 30120113031002.

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 20013031102103 - 2¹⁰ = 20013031101079 is a prime.

It is a super-2 number, since 2×20013031102103² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013031102153) 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, 769731965453 + ... + 769731965478.

It is an arithmetic number, because the mean of its divisors is an integer number (5388123758262).

Almost surely, 2^{20013031102103} is an apocalyptic number.

20013031102103 is a deficient number, since it is larger than the sum of its proper divisors (1539463930945).

20013031102103 is a wasteful number, since it uses less digits than its factorization.

20013031102103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539463930944.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20013031102103 its reverse (30120113031002), we get a palindrome (50133144133105).

The spelling of 20013031102103 in words is "twenty trillion, thirteen billion, thirty-one million, one hundred two thousand, one hundred three".