18149199 has 8 divisors (see below), whose sum is σ = 25472640. Its totient is φ = 11462616.

The previous prime is 18149177. The next prime is 18149207. The reversal of 18149199 is 99194181.

It is a happy number.

18149199 is nontrivially palindromic in base 13.

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

It is not a de Polignac number, because 18149199 - 2⁷ = 18149071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18149199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18149119) 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, 159147 + ... + 159260.

It is an arithmetic number, because the mean of its divisors is an integer number (3184080).

Almost surely, 2^18149199 is an apocalyptic number.

18149199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18149199 is a deficient number, since it is larger than the sum of its proper divisors (7323441).

18149199 is a wasteful number, since it uses less digits than its factorization.

18149199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318429.

The product of its digits is 23328, while the sum is 42.

The square root of 18149199 is about 4260.1876719224. The cubic root of 18149199 is about 262.7962442328.

The spelling of 18149199 in words is "eighteen million, one hundred forty-nine thousand, one hundred ninety-nine".