20203011031103 has 4 divisors (see below), whose sum is σ = 21081402815088. Its totient is φ = 19324619247120.

The previous prime is 20203011031067. The next prime is 20203011031127. The reversal of 20203011031103 is 30113011030202.

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 20203011031103 - 2³⁰ = 20201937289279 is a prime.

It is a super-4 number, since 4×20203011031103⁴ (a number of 54 digits) contains 4444 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 (20203011034103) 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, 439195891958 + ... + 439195892003.

It is an arithmetic number, because the mean of its divisors is an integer number (5270350703772).

Almost surely, 2^{20203011031103} is an apocalyptic number.

20203011031103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20203011031103 is a deficient number, since it is larger than the sum of its proper divisors (878391783985).

20203011031103 is an equidigital number, since it uses as much as digits as its factorization.

20203011031103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878391783984.

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

Adding to 20203011031103 its reverse (30113011030202), we get a palindrome (50316022061305).

Subtracting 20203011031103 from its reverse (30113011030202), we obtain a palindrome (9909999999099).

The spelling of 20203011031103 in words is "twenty trillion, two hundred three billion, eleven million, thirty-one thousand, one hundred three".