20131113203 has 16 divisors (see below), whose sum is σ = 20447271936. Its totient is φ = 19817677920.

The previous prime is 20131113199. The next prime is 20131113209. The reversal of 20131113203 is 30231113102.

It is not a de Polignac number, because 20131113203 - 2² = 20131113199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131113209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19525298 + ... + 19526328.

It is an arithmetic number, because the mean of its divisors is an integer number (1277954496).

Almost surely, 2^20131113203 is an apocalyptic number.

20131113203 is a deficient number, since it is larger than the sum of its proper divisors (316158733).

20131113203 is a wasteful number, since it uses less digits than its factorization.

20131113203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074.

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

Adding to 20131113203 its reverse (30231113102), we get a palindrome (50362226305).

The spelling of 20131113203 in words is "twenty billion, one hundred thirty-one million, one hundred thirteen thousand, two hundred three".