20050431331 has 16 divisors (see below), whose sum is σ = 23063814144. Its totient is φ = 17074452384.

The previous prime is 20050431293. The next prime is 20050431337. The reversal of 20050431331 is 13313405002.

It is a cyclic number.

It is not a de Polignac number, because 20050431331 - 2³¹ = 17902947683 is a prime.

It is a super-2 number, since 2×20050431331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20050431337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1940926 + ... + 1951228.

It is an arithmetic number, because the mean of its divisors is an integer number (1441488384).

Almost surely, 2^20050431331 is an apocalyptic number.

20050431331 is a deficient number, since it is larger than the sum of its proper divisors (3013382813).

20050431331 is a wasteful number, since it uses less digits than its factorization.

20050431331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12090.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 20050431331 its reverse (13313405002), we get a palindrome (33363836333).

The spelling of 20050431331 in words is "twenty billion, fifty million, four hundred thirty-one thousand, three hundred thirty-one".