18119423999 has 4 divisors (see below), whose sum is σ = 18125529840. Its totient is φ = 18113318160.

The previous prime is 18119423981. The next prime is 18119424053. The reversal of 18119423999 is 99932491181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99932491181 = 19 ⋅5259604799.

It is a cyclic number.

It is not a de Polignac number, because 18119423999 - 2²⁰ = 18118375423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18119423969) 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, 3048467 + ... + 3054404.

It is an arithmetic number, because the mean of its divisors is an integer number (4531382460).

Almost surely, 2^18119423999 is an apocalyptic number.

18119423999 is a deficient number, since it is larger than the sum of its proper divisors (6105841).

18119423999 is an equidigital number, since it uses as much as digits as its factorization.

18119423999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6105840.

The product of its digits is 1259712, while the sum is 56.

The spelling of 18119423999 in words is "eighteen billion, one hundred nineteen million, four hundred twenty-three thousand, nine hundred ninety-nine".