20050304531 has 2 divisors, whose sum is σ = 20050304532. Its totient is φ = 20050304530.

The previous prime is 20050304513. The next prime is 20050304539. The reversal of 20050304531 is 13540305002.

Together with previous prime (20050304513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20050304531 - 2²⁶ = 19983195667 is a prime.

It is a super-2 number, since 2×20050304531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20050304497 and 20050304506.

It is not a weakly prime, because it can be changed into another prime (20050304539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025152265 + 10025152266.

It is an arithmetic number, because the mean of its divisors is an integer number (10025152266).

Almost surely, 2^20050304531 is an apocalyptic number.

20050304531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20050304531 is an equidigital number, since it uses as much as digits as its factorization.

20050304531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 20050304531 its reverse (13540305002), we get a palindrome (33590609533).

The spelling of 20050304531 in words is "twenty billion, fifty million, three hundred four thousand, five hundred thirty-one".