520403344020 has 72 divisors (see below), whose sum is σ = 1804064930304. Its totient is φ = 118949335488.

The previous prime is 520403344009. The next prime is 520403344033. The reversal of 520403344020 is 20443304025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206508004 + ... + 206510523.

Almost surely, 2^520403344020 is an apocalyptic number.

It is an amenable number.

520403344020 is an abundant number, since it is smaller than the sum of its proper divisors (1283661586284).

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

520403344020 is a wasteful number, since it uses less digits than its factorization.

520403344020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413018549 (or 413018544 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

Adding to 520403344020 its reverse (20443304025), we get a palindrome (540846648045).

The spelling of 520403344020 in words is "five hundred twenty billion, four hundred three million, three hundred forty-four thousand, twenty".