18351666983 has 4 divisors (see below), whose sum is σ = 19763333688. Its totient is φ = 16940000280.

The previous prime is 18351666947. The next prime is 18351667021. The reversal of 18351666983 is 38966615381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18351666983 - 2¹² = 18351662887 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 (18351666913) 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 3 ways as a sum of consecutive naturals, for example, 705833333 + ... + 705833358.

It is an arithmetic number, because the mean of its divisors is an integer number (4940833422).

Almost surely, 2^18351666983 is an apocalyptic number.

18351666983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18351666983 is a deficient number, since it is larger than the sum of its proper divisors (1411666705).

18351666983 is a wasteful number, since it uses less digits than its factorization.

18351666983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411666704.

The product of its digits is 5598720, while the sum is 56.

The spelling of 18351666983 in words is "eighteen billion, three hundred fifty-one million, six hundred sixty-six thousand, nine hundred eighty-three".