18939119 has 4 divisors (see below), whose sum is σ = 19006800. Its totient is φ = 18871440.

The previous prime is 18939113. The next prime is 18939121. The reversal of 18939119 is 91193981.

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 18939119 - 2⁴ = 18939103 is a prime.

It is a super-2 number, since 2×18939119² = 717380456992322, 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 (18939113) 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, 33419 + ... + 33980.

It is an arithmetic number, because the mean of its divisors is an integer number (4751700).

Almost surely, 2^18939119 is an apocalyptic number.

18939119 is a deficient number, since it is larger than the sum of its proper divisors (67681).

18939119 is an equidigital number, since it uses as much as digits as its factorization.

18939119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67680.

The product of its digits is 17496, while the sum is 41.

The square root of 18939119 is about 4351.9098106464. The cubic root of 18939119 is about 266.5548512117.

The spelling of 18939119 in words is "eighteen million, nine hundred thirty-nine thousand, one hundred nineteen".