18668194 has 8 divisors (see below), whose sum is σ = 28339920. Its totient is φ = 9221556.

The previous prime is 18668179. The next prime is 18668197. The reversal of 18668194 is 49186681.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18668194.

It is not an unprimeable number, because it can be changed into a prime (18668197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56064 + ... + 56395.

It is an arithmetic number, because the mean of its divisors is an integer number (3542490).

Almost surely, 2^18668194 is an apocalyptic number.

18668194 is a deficient number, since it is larger than the sum of its proper divisors (9671726).

18668194 is a wasteful number, since it uses less digits than its factorization.

18668194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112544.

The product of its digits is 82944, while the sum is 43.

The square root of 18668194 is about 4320.6705498105. The cubic root of 18668194 is about 265.2777152657.

The spelling of 18668194 in words is "eighteen million, six hundred sixty-eight thousand, one hundred ninety-four".