18670161 has 4 divisors (see below), whose sum is σ = 24893552. Its totient is φ = 12446772.

The previous prime is 18670123. The next prime is 18670177. The reversal of 18670161 is 16107681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18670161 - 2⁷ = 18670033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18670111) 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 3 ways as a sum of consecutive naturals, for example, 3111691 + ... + 3111696.

It is an arithmetic number, because the mean of its divisors is an integer number (6223388).

Almost surely, 2^18670161 is an apocalyptic number.

It is an amenable number.

18670161 is a deficient number, since it is larger than the sum of its proper divisors (6223391).

18670161 is an equidigital number, since it uses as much as digits as its factorization.

18670161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6223390.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 18670161 is about 4320.8981705196. The cubic root of 18670161 is about 265.2870320559.

The spelling of 18670161 in words is "eighteen million, six hundred seventy thousand, one hundred sixty-one".