18673814808 has 72 divisors (see below), whose sum is σ = 55590635100. Its totient is φ = 5658729120.

The previous prime is 18673814791. The next prime is 18673814827. The reversal of 18673814808 is 80841837681.

It is a happy number.

18673814808 is a `hidden beast` number, since 1 + 86 + 7 + 3 + 81 + 480 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×18673814808² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1063018 + ... + 1080441.

Almost surely, 2^18673814808 is an apocalyptic number.

18673814808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18673814808 is an abundant number, since it is smaller than the sum of its proper divisors (36916820292).

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

18673814808 is a wasteful number, since it uses less digits than its factorization.

18673814808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143493 (or 2143475 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 18673814808 in words is "eighteen billion, six hundred seventy-three million, eight hundred fourteen thousand, eight hundred eight".