18418299 has 8 divisors (see below), whose sum is σ = 24601920. Its totient is φ = 12256776.

The previous prime is 18418291. The next prime is 18418303. The reversal of 18418299 is 99281481.

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

It is not a de Polignac number, because 18418299 - 2³ = 18418291 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 18418299.

It is not an unprimeable number, because it can be changed into a prime (18418291) 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, 3469 + ... + 6990.

It is an arithmetic number, because the mean of its divisors is an integer number (3075240).

Almost surely, 2^18418299 is an apocalyptic number.

18418299 is a deficient number, since it is larger than the sum of its proper divisors (6183621).

18418299 is a wasteful number, since it uses less digits than its factorization.

18418299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11049.

The product of its digits is 41472, while the sum is 42.

The square root of 18418299 is about 4291.6545760347. The cubic root of 18418299 is about 264.0887127253.

The spelling of 18418299 in words is "eighteen million, four hundred eighteen thousand, two hundred ninety-nine".