18683668517 has 8 divisors (see below), whose sum is σ = 19307465760. Its totient is φ = 18068475600.

The previous prime is 18683668477. The next prime is 18683668519. The reversal of 18683668517 is 71586638681.

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

It is a cyclic number.

It is not a de Polignac number, because 18683668517 - 2¹⁶ = 18683602981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18683668519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2146667 + ... + 2155352.

It is an arithmetic number, because the mean of its divisors is an integer number (2413433220).

Almost surely, 2^18683668517 is an apocalyptic number.

It is an amenable number.

18683668517 is a deficient number, since it is larger than the sum of its proper divisors (623797243).

18683668517 is a wasteful number, since it uses less digits than its factorization.

18683668517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302163.

The product of its digits is 11612160, while the sum is 59.

The spelling of 18683668517 in words is "eighteen billion, six hundred eighty-three million, six hundred sixty-eight thousand, five hundred seventeen".