18408375519 has 8 divisors (see below), whose sum is σ = 25611652992. Its totient is φ = 11738674200.

The previous prime is 18408375481. The next prime is 18408375527. The reversal of 18408375519 is 91557380481.

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

It is not a de Polignac number, because 18408375519 - 2⁸ = 18408375263 is a prime.

It is a super-2 number, since 2×18408375519² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18408375569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133393957 + ... + 133394094.

It is an arithmetic number, because the mean of its divisors is an integer number (3201456624).

Almost surely, 2^18408375519 is an apocalyptic number.

18408375519 is a deficient number, since it is larger than the sum of its proper divisors (7203277473).

18408375519 is a wasteful number, since it uses less digits than its factorization.

18408375519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266788077.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 18408375519 in words is "eighteen billion, four hundred eight million, three hundred seventy-five thousand, five hundred nineteen".