20131322031 has 24 divisors (see below), whose sum is σ = 29522997504. Its totient is φ = 13215906000.

The previous prime is 20131321967. The next prime is 20131322039. The reversal of 20131322031 is 13022313102.

It is not a de Polignac number, because 20131322031 - 2⁶ = 20131321967 is a prime.

It is a super-2 number, since 2×20131322031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20131321995 and 20131322013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131322039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2861340 + ... + 2868366.

It is an arithmetic number, because the mean of its divisors is an integer number (1230124896).

Almost surely, 2^20131322031 is an apocalyptic number.

20131322031 is a deficient number, since it is larger than the sum of its proper divisors (9391675473).

20131322031 is a wasteful number, since it uses less digits than its factorization.

20131322031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11851 (or 11848 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20131322031 its reverse (13022313102), we get a palindrome (33153635133).

The spelling of 20131322031 in words is "twenty billion, one hundred thirty-one million, three hundred twenty-two thousand, thirty-one".