18459161 has 8 divisors (see below), whose sum is σ = 22337280. Its totient is φ = 14891328.

The previous prime is 18459157. The next prime is 18459173. The reversal of 18459161 is 16195481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18459161 - 2² = 18459157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18459101) 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 7 ways as a sum of consecutive naturals, for example, 77441 + ... + 77678.

It is an arithmetic number, because the mean of its divisors is an integer number (2792160).

Almost surely, 2^18459161 is an apocalyptic number.

It is an amenable number.

18459161 is a deficient number, since it is larger than the sum of its proper divisors (3878119).

18459161 is a wasteful number, since it uses less digits than its factorization.

18459161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155143.

The product of its digits is 8640, while the sum is 35.

The square root of 18459161 is about 4296.4125732988. The cubic root of 18459161 is about 264.2838668764.

The spelling of 18459161 in words is "eighteen million, four hundred fifty-nine thousand, one hundred sixty-one".