18663113 has 8 divisors (see below), whose sum is σ = 21483840. Its totient is φ = 15881040.

The previous prime is 18663109. The next prime is 18663119. The reversal of 18663113 is 31136681.

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

It is not a de Polignac number, because 18663113 - 2² = 18663109 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18663119) 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, 8618 + ... + 10563.

It is an arithmetic number, because the mean of its divisors is an integer number (2685480).

Almost surely, 2^18663113 is an apocalyptic number.

It is an amenable number.

18663113 is a deficient number, since it is larger than the sum of its proper divisors (2820727).

18663113 is a wasteful number, since it uses less digits than its factorization.

18663113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19327.

The product of its digits is 2592, while the sum is 29.

The square root of 18663113 is about 4320.0825223600. The cubic root of 18663113 is about 265.2536458355.

Adding to 18663113 its reverse (31136681), we get a palindrome (49799794).

The spelling of 18663113 in words is "eighteen million, six hundred sixty-three thousand, one hundred thirteen".