18990119 has 4 divisors (see below), whose sum is σ = 19014744. Its totient is φ = 18965496.

The previous prime is 18990113. The next prime is 18990143. The reversal of 18990119 is 91109981.

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 18990119 - 2⁸ = 18989863 is a prime.

It is a super-2 number, since 2×18990119² = 721249239268322, 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 (18990113) 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, 11117 + ... + 12710.

It is an arithmetic number, because the mean of its divisors is an integer number (4753686).

Almost surely, 2^18990119 is an apocalyptic number.

18990119 is a deficient number, since it is larger than the sum of its proper divisors (24625).

18990119 is an equidigital number, since it uses as much as digits as its factorization.

18990119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24624.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 18990119 is about 4357.7653677085. The cubic root of 18990119 is about 266.7938998745.

The spelling of 18990119 in words is "eighteen million, nine hundred ninety thousand, one hundred nineteen".