20040031131 has 32 divisors (see below), whose sum is σ = 27615126528. Its totient is φ = 12917312640.

The previous prime is 20040031129. The next prime is 20040031159. The reversal of 20040031131 is 13113004002.

It is not a de Polignac number, because 20040031131 - 2¹ = 20040031129 is a prime.

It is a super-2 number, since 2×20040031131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20040031131.

It is not an unprimeable number, because it can be changed into a prime (20040031931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18887341 + ... + 18888401.

It is an arithmetic number, because the mean of its divisors is an integer number (862972704).

Almost surely, 2^20040031131 is an apocalyptic number.

20040031131 is a deficient number, since it is larger than the sum of its proper divisors (7575095397).

20040031131 is a wasteful number, since it uses less digits than its factorization.

20040031131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20040031131 its reverse (13113004002), we get a palindrome (33153035133).

The spelling of 20040031131 in words is "twenty billion, forty million, thirty-one thousand, one hundred thirty-one".