18678328319 has 8 divisors (see below), whose sum is σ = 21347898528. Its totient is φ = 16009067520.

The previous prime is 18678328307. The next prime is 18678328343. The reversal of 18678328319 is 91382387681.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18678328319 is a prime.

It is a super-2 number, since 2×18678328319² (a number of 21 digits) 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 (18678328369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70979 + ... + 205899.

It is an arithmetic number, because the mean of its divisors is an integer number (2668487316).

Almost surely, 2^18678328319 is an apocalyptic number.

18678328319 is a deficient number, since it is larger than the sum of its proper divisors (2669570209).

18678328319 is a wasteful number, since it uses less digits than its factorization.

18678328319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154705.

The product of its digits is 3483648, while the sum is 56.

The spelling of 18678328319 in words is "eighteen billion, six hundred seventy-eight million, three hundred twenty-eight thousand, three hundred nineteen".