20004313131 has 24 divisors (see below), whose sum is σ = 31540766400. Its totient is φ = 12116588400.

The previous prime is 20004313111. The next prime is 20004313159. The reversal of 20004313131 is 13131340002.

20004313131 is a `hidden beast` number, since 200 + 0 + 431 + 3 + 1 + 31 = 666.

It is not a de Polignac number, because 20004313131 - 2⁷ = 20004313003 is a prime.

It is a super-2 number, since 2×20004313131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20004313111) 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, 108736 + ... + 227666.

It is an arithmetic number, because the mean of its divisors is an integer number (1314198600).

Almost surely, 2^20004313131 is an apocalyptic number.

20004313131 is a deficient number, since it is larger than the sum of its proper divisors (11536453269).

20004313131 is a wasteful number, since it uses less digits than its factorization.

20004313131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120647 (or 120644 counting only the distinct ones).

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

Adding to 20004313131 its reverse (13131340002), we get a palindrome (33135653133).

The spelling of 20004313131 in words is "twenty billion, four million, three hundred thirteen thousand, one hundred thirty-one".