18452161 has 24 divisors (see below), whose sum is σ = 23577792. Its totient is φ = 14061600.

The previous prime is 18452143. The next prime is 18452167. The reversal of 18452161 is 16125481.

18452161 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 18452161 - 2⁵ = 18452129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18452167) 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 23 ways as a sum of consecutive naturals, for example, 87346 + ... + 87556.

It is an arithmetic number, because the mean of its divisors is an integer number (982408).

Almost surely, 2^18452161 is an apocalyptic number.

It is an amenable number.

18452161 is a deficient number, since it is larger than the sum of its proper divisors (5125631).

18452161 is a wasteful number, since it uses less digits than its factorization.

18452161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 262 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 18452161 is about 4295.5978629290. The cubic root of 18452161 is about 264.2504558063.

The spelling of 18452161 in words is "eighteen million, four hundred fifty-two thousand, one hundred sixty-one".