18108197 has 8 divisors (see below), whose sum is σ = 19101600. Its totient is φ = 17118864.

The previous prime is 18108173. The next prime is 18108217. The reversal of 18108197 is 79180181.

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 18108197 - 2¹² = 18104101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18108697) 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, 13754 + ... + 15012.

It is an arithmetic number, because the mean of its divisors is an integer number (2387700).

Almost surely, 2^18108197 is an apocalyptic number.

It is an amenable number.

18108197 is a deficient number, since it is larger than the sum of its proper divisors (993403).

18108197 is a wasteful number, since it uses less digits than its factorization.

18108197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 18108197 is about 4255.3727216309. The cubic root of 18108197 is about 262.5981951601.

The spelling of 18108197 in words is "eighteen million, one hundred eight thousand, one hundred ninety-seven".