18309473279 has 8 divisors (see below), whose sum is σ = 18881931600. Its totient is φ = 17743009600.

The previous prime is 18309473269. The next prime is 18309473323. The reversal of 18309473279 is 97237490381.

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

It is a cyclic number.

It is not a de Polignac number, because 18309473279 - 2⁸ = 18309473023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18309473279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18309473269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1492457 + ... + 1504674.

It is an arithmetic number, because the mean of its divisors is an integer number (2360241450).

Almost surely, 2^18309473279 is an apocalyptic number.

18309473279 is a deficient number, since it is larger than the sum of its proper divisors (572458321).

18309473279 is a wasteful number, since it uses less digits than its factorization.

18309473279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2997321.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 18309473279 in words is "eighteen billion, three hundred nine million, four hundred seventy-three thousand, two hundred seventy-nine".