18673426628856 has 48 divisors (see below), whose sum is σ = 52317790129800. Its totient is φ = 6009838454592.

The previous prime is 18673426628851. The next prime is 18673426628887. The reversal of 18673426628856 is 65882662437681.

18673426628856 is a `hidden beast` number, since 1 + 8 + 6 + 7 + 34 + 266 + 288 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18673426628851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4471603906 + ... + 4471608081.

Almost surely, 2^{18673426628856} is an apocalyptic number.

It is an amenable number.

18673426628856 is an abundant number, since it is smaller than the sum of its proper divisors (33644363500944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18673426628856 is a wasteful number, since it uses less digits than its factorization.

18673426628856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8943212028 (or 8943212021 counting only the distinct ones).

The product of its digits is 1114767360, while the sum is 72.

The spelling of 18673426628856 in words is "eighteen trillion, six hundred seventy-three billion, four hundred twenty-six million, six hundred twenty-eight thousand, eight hundred fifty-six".