18704668081 has 8 divisors (see below), whose sum is σ = 21605392224. Its totient is φ = 16003993920.

The previous prime is 18704668079. The next prime is 18704668111. The reversal of 18704668081 is 18086640781.

It is a happy number.

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 18704668081 - 2¹ = 18704668079 is a prime.

It is a super-2 number, since 2×18704668081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18704668481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50012295 + ... + 50012668.

It is an arithmetic number, because the mean of its divisors is an integer number (2700674028).

Almost surely, 2^18704668081 is an apocalyptic number.

18704668081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18704668081 is a deficient number, since it is larger than the sum of its proper divisors (2900724143).

18704668081 is a wasteful number, since it uses less digits than its factorization.

18704668081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100024991.

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 18704668081 in words is "eighteen billion, seven hundred four million, six hundred sixty-eight thousand, eighty-one".