520420013 has 16 divisors (see below), whose sum is σ = 562214400. Its totient is φ = 480135600.

The previous prime is 520419983. The next prime is 520420027. The reversal of 520420013 is 310024025.

It is a cyclic number.

It is not a de Polignac number, because 520420013 - 2²² = 516225709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520419973 and 520420000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520420063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357938 + ... + 359388.

It is an arithmetic number, because the mean of its divisors is an integer number (35138400).

Almost surely, 2^520420013 is an apocalyptic number.

It is an amenable number.

520420013 is a deficient number, since it is larger than the sum of its proper divisors (41794387).

520420013 is a wasteful number, since it uses less digits than its factorization.

520420013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 520420013 is about 22812.7160373332. The cubic root of 520420013 is about 804.3616007707.

Adding to 520420013 its reverse (310024025), we get a palindrome (830444038).

The spelling of 520420013 in words is "five hundred twenty million, four hundred twenty thousand, thirteen".