520305020 has 24 divisors (see below), whose sum is σ = 1099980000. Its totient is φ = 206724032.

The previous prime is 520305017. The next prime is 520305029. The reversal of 520305020 is 20503025.

It is a self number, because there is not a number n which added to its sum of digits gives 520305020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520305029) 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, 84320 + ... + 90279.

It is an arithmetic number, because the mean of its divisors is an integer number (45832500).

Almost surely, 2^520305020 is an apocalyptic number.

It is an amenable number.

520305020 is an abundant number, since it is smaller than the sum of its proper divisors (579674980).

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

520305020 is a wasteful number, since it uses less digits than its factorization.

520305020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174757 (or 174755 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 520305020 is about 22810.1955274390. The cubic root of 520305020 is about 804.3023519814.

Adding to 520305020 its reverse (20503025), we get a palindrome (540808045).

The spelling of 520305020 in words is "five hundred twenty million, three hundred five thousand, twenty".