18530560129 has 9 divisors (see below), whose sum is σ = 18652094211. Its totient is φ = 18409815480.

The previous prime is 18530560063. The next prime is 18530560159. The reversal of 18530560129 is 92106503581.

The square root of 18530560129 is 136127.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18156215025 + 374345104 = 134745^2 + 19348^2 .

It is not a de Polignac number, because 18530560129 - 2⁹ = 18530559617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18530560091 and 18530560100.

It is not an unprimeable number, because it can be changed into a prime (18530560159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26816674 + ... + 26817364.

Almost surely, 2^18530560129 is an apocalyptic number.

18530560129 is the 136127-th square number.

18530560129 is the 68064-th centered octagonal number.

It is an amenable number.

18530560129 is a deficient number, since it is larger than the sum of its proper divisors (121534082).

18530560129 is an frugal number, since it uses more digits than its factorization.

18530560129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 18530560129 in words is "eighteen billion, five hundred thirty million, five hundred sixty thousand, one hundred twenty-nine".