18468169 has 4 divisors (see below), whose sum is σ = 18477844. Its totient is φ = 18458496.

The previous prime is 18468161. The next prime is 18468173. The reversal of 18468169 is 96186481.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96186481 = 3539 ⋅27179.

It can be written as a sum of positive squares in 2 ways, for example, as 18318400 + 149769 = 4280^2 + 387^2 .

It is a cyclic number.

It is not a de Polignac number, because 18468169 - 2³ = 18468161 is a prime.

It is a super-2 number, since 2×18468169² = 682146532425122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18468161) 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, 912 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (4619461).

Almost surely, 2^18468169 is an apocalyptic number.

It is an amenable number.

18468169 is a deficient number, since it is larger than the sum of its proper divisors (9675).

18468169 is an equidigital number, since it uses as much as digits as its factorization.

18468169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9674.

The product of its digits is 82944, while the sum is 43.

The square root of 18468169 is about 4297.4607618918. The cubic root of 18468169 is about 264.3268497242.

The spelling of 18468169 in words is "eighteen million, four hundred sixty-eight thousand, one hundred sixty-nine".