18171618083 has 2 divisors, whose sum is σ = 18171618084. Its totient is φ = 18171618082.

The previous prime is 18171618079. The next prime is 18171618097. The reversal of 18171618083 is 38081617181.

It is a weak prime.

It is an emirp because it is prime and its reverse (38081617181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18171618083 - 2² = 18171618079 is a prime.

It is a super-3 number, since 3×18171618083³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18171617083) 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 as a sum of consecutive naturals, namely, 9085809041 + 9085809042.

It is an arithmetic number, because the mean of its divisors is an integer number (9085809042).

Almost surely, 2^18171618083 is an apocalyptic number.

18171618083 is a deficient number, since it is larger than the sum of its proper divisors (1).

18171618083 is an equidigital number, since it uses as much as digits as its factorization.

18171618083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 44.

The spelling of 18171618083 in words is "eighteen billion, one hundred seventy-one million, six hundred eighteen thousand, eighty-three".