18529188049 has 4 divisors (see below), whose sum is σ = 18529789540. Its totient is φ = 18528586560.

The previous prime is 18529188017. The next prime is 18529188053. The reversal of 18529188049 is 94088192581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16987212225 + 1541975824 = 130335^2 + 39268^2 .

It is a cyclic number.

It is not a de Polignac number, because 18529188049 - 2⁵ = 18529188017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18529188749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251892 + ... + 317029.

It is an arithmetic number, because the mean of its divisors is an integer number (4632447385).

Almost surely, 2^18529188049 is an apocalyptic number.

It is an amenable number.

18529188049 is a deficient number, since it is larger than the sum of its proper divisors (601491).

18529188049 is an equidigital number, since it uses as much as digits as its factorization.

18529188049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601490.

The product of its (nonzero) digits is 1658880, while the sum is 55.

The spelling of 18529188049 in words is "eighteen billion, five hundred twenty-nine million, one hundred eighty-eight thousand, forty-nine".