20113131003 has 16 divisors (see below), whose sum is σ = 30660047616. Its totient is φ = 11488917600.

The previous prime is 20113130969. The next prime is 20113131013. The reversal of 20113131003 is 30013131102.

It is not a de Polignac number, because 20113131003 - 2¹⁰ = 20113129979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20113131013) 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, 121273 + ... + 234378.

It is an arithmetic number, because the mean of its divisors is an integer number (1916252976).

Almost surely, 2^20113131003 is an apocalyptic number.

20113131003 is a deficient number, since it is larger than the sum of its proper divisors (10546916613).

20113131003 is a wasteful number, since it uses less digits than its factorization.

20113131003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358354.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 20113131003 its reverse (30013131102), we get a palindrome (50126262105).

Subtracting 20113131003 from its reverse (30013131102), we obtain a palindrome (9900000099).

The spelling of 20113131003 in words is "twenty billion, one hundred thirteen million, one hundred thirty-one thousand, three".