18398119 has 4 divisors (see below), whose sum is σ = 18414640. Its totient is φ = 18381600.

The previous prime is 18398101. The next prime is 18398129. The reversal of 18398119 is 91189381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18398119 - 2⁹ = 18397607 is a prime.

It is a super-2 number, since 2×18398119² = 676981565476322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18398129) 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, 6459 + ... + 8860.

It is an arithmetic number, because the mean of its divisors is an integer number (4603660).

Almost surely, 2^18398119 is an apocalyptic number.

18398119 is a deficient number, since it is larger than the sum of its proper divisors (16521).

18398119 is a wasteful number, since it uses less digits than its factorization.

18398119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16520.

The product of its digits is 15552, while the sum is 40.

The square root of 18398119 is about 4289.3028571086. The cubic root of 18398119 is about 263.9922279239.

The spelling of 18398119 in words is "eighteen million, three hundred ninety-eight thousand, one hundred nineteen".