20031131044 has 12 divisors (see below), whose sum is σ = 35075494300. Its totient is φ = 10009561248.

The previous prime is 20031131041. The next prime is 20031131101. The reversal of 20031131044 is 44013113002.

It can be written as a sum of positive squares in 2 ways, for example, as 16607476900 + 3423654144 = 128870^2 + 58512^2 .

It is not an unprimeable number, because it can be changed into a prime (20031131041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1493559 + ... + 1506910.

Almost surely, 2^20031131044 is an apocalyptic number.

It is an amenable number.

20031131044 is a deficient number, since it is larger than the sum of its proper divisors (15044363256).

20031131044 is a wasteful number, since it uses less digits than its factorization.

20031131044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002142 (or 3002140 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20031131044 its reverse (44013113002), we get a palindrome (64044244046).

The spelling of 20031131044 in words is "twenty billion, thirty-one million, one hundred thirty-one thousand, forty-four".