13530520818 has 24 divisors (see below), whose sum is σ = 29546969088. Its totient is φ = 4474659672.

The previous prime is 13530520789. The next prime is 13530520831. The reversal of 13530520818 is 81802503531.

13530520818 is a `hidden beast` number, since 1 + 3 + 53 + 0 + 520 + 81 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2957146 + ... + 2961717.

It is an arithmetic number, because the mean of its divisors is an integer number (1231123712).

Almost surely, 2^13530520818 is an apocalyptic number.

13530520818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13530520818 is an abundant number, since it is smaller than the sum of its proper divisors (16016448270).

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

13530520818 is a wasteful number, since it uses less digits than its factorization.

13530520818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5918998 (or 5918995 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 13530520818 in words is "thirteen billion, five hundred thirty million, five hundred twenty thousand, eight hundred eighteen".