18677612808 has 48 divisors (see below), whose sum is σ = 50593053420. Its totient is φ = 6224904576.

The previous prime is 18677612801. The next prime is 18677612851. The reversal of 18677612808 is 80821677681.

It is a happy number.

18677612808 is a `hidden beast` number, since 18 + 6 + 7 + 7 + 612 + 8 + 0 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15720645924 + 2956966884 = 125382^2 + 54378^2 .

It is not an unprimeable number, because it can be changed into a prime (18677612801) 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, 563710 + ... + 595922.

Almost surely, 2^18677612808 is an apocalyptic number.

18677612808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18677612808 is an abundant number, since it is smaller than the sum of its proper divisors (31915440612).

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

18677612808 is a wasteful number, since it uses less digits than its factorization.

18677612808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40278 (or 40271 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 18677612808 in words is "eighteen billion, six hundred seventy-seven million, six hundred twelve thousand, eight hundred eight".