520500020 has 24 divisors (see below), whose sum is σ = 1100295168. Its totient is φ = 206820000.

The previous prime is 520500017. The next prime is 520500023. The reversal of 520500020 is 20005025.

It is an interprime number because it is at equal distance from previous prime (520500017) and next prime (520500023).

It is a junction number, because it is equal to n+sod(n) for n = 520499968 and 520500004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520500023) 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, 83156 + ... + 89195.

It is an arithmetic number, because the mean of its divisors is an integer number (45845632).

Almost surely, 2^520500020 is an apocalyptic number.

It is an amenable number.

520500020 is an abundant number, since it is smaller than the sum of its proper divisors (579795148).

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

520500020 is a wasteful number, since it uses less digits than its factorization.

520500020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172511 (or 172509 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 520500020 is about 22814.4695314180. The cubic root of 520500020 is about 804.4028182869.

Adding to 520500020 its reverse (20005025), we get a palindrome (540505045).

The spelling of 520500020 in words is "five hundred twenty million, five hundred thousand, twenty".