20205130520 has 32 divisors (see below), whose sum is σ = 45470905200. Its totient is φ = 8080387968.

The previous prime is 20205130511. The next prime is 20205130523. The reversal of 20205130520 is 2503150202.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20205130492 and 20205130501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205130523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154826 + ... + 253734.

Almost surely, 2^20205130520 is an apocalyptic number.

20205130520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20205130520 is an abundant number, since it is smaller than the sum of its proper divisors (25265774680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20205130520 is a wasteful number, since it uses less digits than its factorization.

20205130520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104027 (or 104023 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 20205130520 its reverse (2503150202), we get a palindrome (22708280722).

The spelling of 20205130520 in words is "twenty billion, two hundred five million, one hundred thirty thousand, five hundred twenty".