18018816735671 has 2 divisors, whose sum is σ = 18018816735672. Its totient is φ = 18018816735670.

The previous prime is 18018816735649. The next prime is 18018816735719. The reversal of 18018816735671 is 17653761881081.

It is a weak prime.

It is an emirp because it is prime and its reverse (17653761881081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18018816735671 - 2¹⁴ = 18018816719287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18018816735971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9009408367835 + 9009408367836.

It is an arithmetic number, because the mean of its divisors is an integer number (9009408367836).

Almost surely, 2^{18018816735671} is an apocalyptic number.

18018816735671 is a deficient number, since it is larger than the sum of its proper divisors (1).

18018816735671 is an equidigital number, since it uses as much as digits as its factorization.

18018816735671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 62.

The spelling of 18018816735671 in words is "eighteen trillion, eighteen billion, eight hundred sixteen million, seven hundred thirty-five thousand, six hundred seventy-one".