18704118169 has 9 divisors (see below), whose sum is σ = 20560725759. Its totient is φ = 17002376160.

The previous prime is 18704118163. The next prime is 18704118179. The reversal of 18704118169 is 96181140781.

The square root of 18704118169 is 136763.

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., 2444808025 + 16259310144 = 49445^2 + 127512^2 .

It is not a de Polignac number, because 18704118169 - 2³ = 18704118161 is a prime.

It is a super-2 number, since 2×18704118169² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18704118161) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 1498177 + ... + 1510609.

Almost surely, 2^18704118169 is an apocalyptic number.

18704118169 is the 136763-rd square number.

18704118169 is the 68382-nd centered octagonal number.

It is an amenable number.

18704118169 is a deficient number, since it is larger than the sum of its proper divisors (1856607590).

18704118169 is an frugal number, since it uses more digits than its factorization.

18704118169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24888 (or 12444 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 46.

The spelling of 18704118169 in words is "eighteen billion, seven hundred four million, one hundred eighteen thousand, one hundred sixty-nine".