18304195849 has 9 divisors (see below), whose sum is σ = 18425812629. Its totient is φ = 18183379200.

The previous prime is 18304195837. The next prime is 18304195859. The reversal of 18304195849 is 94859140381.

The square root of 18304195849 is 135293.

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

It can be written as a sum of positive squares in 4 ways, for example, as 329967225 + 17974228624 = 18165^2 + 134068^2 .

It is not a de Polignac number, because 18304195849 - 2⁹ = 18304195337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18304195796 and 18304195805.

It is not an unprimeable number, because it can be changed into a prime (18304195859) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26111199 + ... + 26111899.

Almost surely, 2^18304195849 is an apocalyptic number.

18304195849 is the 135293-rd square number.

18304195849 is the 67647-th centered octagonal number.

It is an amenable number.

18304195849 is a deficient number, since it is larger than the sum of its proper divisors (121616780).

18304195849 is an frugal number, since it uses more digits than its factorization.

18304195849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 18304195849 in words is "eighteen billion, three hundred four million, one hundred ninety-five thousand, eight hundred forty-nine".