18383680506 has 8 divisors (see below), whose sum is σ = 36767361024. Its totient is φ = 6127893500.

The previous prime is 18383680499. The next prime is 18383680519. The reversal of 18383680506 is 60508638381.

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

18383680506 is an admirable number.

It is a Curzon 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, 1531973370 + ... + 1531973381.

It is an arithmetic number, because the mean of its divisors is an integer number (4595920128).

Almost surely, 2^18383680506 is an apocalyptic number.

18383680506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18383680506 is a wasteful number, since it uses less digits than its factorization.

18383680506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063946756.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 18383680506 in words is "eighteen billion, three hundred eighty-three million, six hundred eighty thousand, five hundred six".