20031442131 has 8 divisors (see below), whose sum is σ = 26856151504. Its totient is φ = 13280513760.

The previous prime is 20031442127. The next prime is 20031442139. The reversal of 20031442131 is 13124413002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20031442131 - 2² = 20031442127 is a prime.

It is a super-2 number, since 2×20031442131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20031442098 and 20031442107.

It is not an unprimeable number, because it can be changed into a prime (20031442139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18444616 + ... + 18445701.

It is an arithmetic number, because the mean of its divisors is an integer number (3357018938).

Almost surely, 2^20031442131 is an apocalyptic number.

20031442131 is a deficient number, since it is larger than the sum of its proper divisors (6824709373).

20031442131 is a wasteful number, since it uses less digits than its factorization.

20031442131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36890501.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20031442131 its reverse (13124413002), we get a palindrome (33155855133).

The spelling of 20031442131 in words is "twenty billion, thirty-one million, four hundred forty-two thousand, one hundred thirty-one".