20040043131 has 6 divisors (see below), whose sum is σ = 28946728980. Its totient is φ = 13360028748.

The previous prime is 20040043103. The next prime is 20040043141. The reversal of 20040043131 is 13134004002.

20040043131 is a `hidden beast` number, since 200 + 4 + 0 + 0 + 431 + 31 = 666.

It is not a de Polignac number, because 20040043131 - 2¹⁰ = 20040042107 is a prime.

It is a super-2 number, since 2×20040043131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20040043141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1113335721 + ... + 1113335738.

It is an arithmetic number, because the mean of its divisors is an integer number (4824454830).

Almost surely, 2^20040043131 is an apocalyptic number.

20040043131 is a deficient number, since it is larger than the sum of its proper divisors (8906685849).

20040043131 is a wasteful number, since it uses less digits than its factorization.

20040043131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226671465 (or 2226671462 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20040043131 its reverse (13134004002), we get a palindrome (33174047133).

The spelling of 20040043131 in words is "twenty billion, forty million, forty-three thousand, one hundred thirty-one".