18673426434838 has 8 divisors (see below), whose sum is σ = 32011588174032. Its totient is φ = 8002897043496.

The previous prime is 18673426434827. The next prime is 18673426434841. The reversal of 18673426434838 is 83843462437681.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666908086945 + ... + 666908086972.

It is an arithmetic number, because the mean of its divisors is an integer number (4001448521754).

Almost surely, 2^{18673426434838} is an apocalyptic number.

18673426434838 is a deficient number, since it is larger than the sum of its proper divisors (13338161739194).

18673426434838 is a wasteful number, since it uses less digits than its factorization.

18673426434838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333816173926.

The product of its digits is 445906944, while the sum is 67.

The spelling of 18673426434838 in words is "eighteen trillion, six hundred seventy-three billion, four hundred twenty-six million, four hundred thirty-four thousand, eight hundred thirty-eight".