18110561 has 8 divisors (see below), whose sum is σ = 21202944. Its totient is φ = 15144480.

The previous prime is 18110551. The next prime is 18110563. The reversal of 18110561 is 16501181.

It is a happy number.

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 18110561 - 2¹⁴ = 18094177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18110563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31265 + ... + 31838.

It is an arithmetic number, because the mean of its divisors is an integer number (2650368).

Almost surely, 2^18110561 is an apocalyptic number.

It is an amenable number.

18110561 is a deficient number, since it is larger than the sum of its proper divisors (3092383).

18110561 is an equidigital number, since it uses as much as digits as its factorization.

18110561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63151.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 18110561 is about 4255.6504790690. The cubic root of 18110561 is about 262.6096219396.

The spelling of 18110561 in words is "eighteen million, one hundred ten thousand, five hundred sixty-one".