20503130031 has 12 divisors (see below), whose sum is σ = 29628153880. Its totient is φ = 13662974160.

The previous prime is 20503130017. The next prime is 20503130047. The reversal of 20503130031 is 13003130502.

20503130031 is a `hidden beast` number, since 2 + 0 + 503 + 130 + 0 + 31 = 666.

It is not a de Polignac number, because 20503130031 - 2⁶ = 20503129967 is a prime.

It is a super-2 number, since 2×20503130031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20503129986 and 20503130013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503170031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 459076 + ... + 501753.

Almost surely, 2^20503130031 is an apocalyptic number.

20503130031 is a deficient number, since it is larger than the sum of its proper divisors (9125023849).

20503130031 is a wasteful number, since it uses less digits than its factorization.

20503130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963206 (or 963203 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

Adding to 20503130031 its reverse (13003130502), we get a palindrome (33506260533).

The spelling of 20503130031 in words is "twenty billion, five hundred three million, one hundred thirty thousand, thirty-one".