520018520 has 32 divisors (see below), whose sum is σ = 1337191200. Its totient is φ = 178291968.

The previous prime is 520018511. The next prime is 520018531. The reversal of 520018520 is 25810025.

It is a super-2 number, since 2×520018520² = 540838522285980800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928325 + ... + 928884.

It is an arithmetic number, because the mean of its divisors is an integer number (41787225).

Almost surely, 2^520018520 is an apocalyptic number.

It is an amenable number.

520018520 is an abundant number, since it is smaller than the sum of its proper divisors (817172680).

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

520018520 is a wasteful number, since it uses less digits than its factorization.

520018520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857227 (or 1857223 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 520018520 is about 22803.9145762301. The cubic root of 520018520 is about 804.1546982508.

Adding to 520018520 its reverse (25810025), we get a palindrome (545828545).

The spelling of 520018520 in words is "five hundred twenty million, eighteen thousand, five hundred twenty".