520508020 has 24 divisors (see below), whose sum is σ = 1097767944. Its totient is φ = 207307776.

The previous prime is 520508017. The next prime is 520508039. The reversal of 520508020 is 20805025.

It can be written as a sum of positive squares in 4 ways, for example, as 394384 + 520113636 = 628^2 + 22806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 520507982 and 520508000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51189 + ... + 60508.

It is an arithmetic number, because the mean of its divisors is an integer number (45740331).

Almost surely, 2^520508020 is an apocalyptic number.

It is an amenable number.

520508020 is an abundant number, since it is smaller than the sum of its proper divisors (577259924).

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

520508020 is a wasteful number, since it uses less digits than its factorization.

520508020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111939 (or 111937 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 520508020 is about 22814.6448580731. The cubic root of 520508020 is about 804.4069394457.

The spelling of 520508020 in words is "five hundred twenty million, five hundred eight thousand, twenty".