20131031133 has 12 divisors (see below), whose sum is σ = 29086512000. Its totient is φ = 13416830856.

The previous prime is 20131031113. The next prime is 20131031147. The reversal of 20131031133 is 33113013102.

It is a happy number.

It is not a de Polignac number, because 20131031133 - 2⁸ = 20131030877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131031113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288141 + ... + 351122.

It is an arithmetic number, because the mean of its divisors is an integer number (2423876000).

Almost surely, 2^20131031133 is an apocalyptic number.

It is an amenable number.

20131031133 is a deficient number, since it is larger than the sum of its proper divisors (8955480867).

20131031133 is a wasteful number, since it uses less digits than its factorization.

20131031133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642768 (or 642765 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 20131031133 its reverse (33113013102), we get a palindrome (53244044235).

The spelling of 20131031133 in words is "twenty billion, one hundred thirty-one million, thirty-one thousand, one hundred thirty-three".