16520502340 has 12 divisors (see below), whose sum is σ = 34693054956. Its totient is φ = 6608200928.

The previous prime is 16520502319. The next prime is 16520502359. The reversal of 16520502340 is 4320502561.

16520502340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7355120644 + 9165381696 = 85762^2 + 95736^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16520502299 and 16520502308.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 413012539 + ... + 413012578.

It is an arithmetic number, because the mean of its divisors is an integer number (2891087913).

Almost surely, 2^16520502340 is an apocalyptic number.

16520502340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16520502340 is an abundant number, since it is smaller than the sum of its proper divisors (18172552616).

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

16520502340 is a wasteful number, since it uses less digits than its factorization.

16520502340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826025126 (or 826025124 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 16520502340 in words is "sixteen billion, five hundred twenty million, five hundred two thousand, three hundred forty".