18678334129809 has 8 divisors (see below), whose sum is σ = 25083614179680. Its totient is φ = 12362638416576.

The previous prime is 18678334129751. The next prime is 18678334129877. The reversal of 18678334129809 is 90892143387681.

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

It is not a de Polignac number, because 18678334129809 - 2³⁷ = 18540895176337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18678334124809) 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, 22396083672 + ... + 22396084505.

It is an arithmetic number, because the mean of its divisors is an integer number (3135451772460).

Almost surely, 2^{18678334129809} is an apocalyptic number.

It is an amenable number.

18678334129809 is a deficient number, since it is larger than the sum of its proper divisors (6405280049871).

18678334129809 is a wasteful number, since it uses less digits than its factorization.

18678334129809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44792168319.

The product of its (nonzero) digits is 125411328, while the sum is 69.

The spelling of 18678334129809 in words is "eighteen trillion, six hundred seventy-eight billion, three hundred thirty-four million, one hundred twenty-nine thousand, eight hundred nine".