18618043787699 has 2 divisors, whose sum is σ = 18618043787700. Its totient is φ = 18618043787698.

The previous prime is 18618043787621. The next prime is 18618043787701. The reversal of 18618043787699 is 99678734081681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18618043787699 - 2³⁶ = 18549324310963 is a prime.

Together with 18618043787701, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18618043487699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9309021893849 + 9309021893850.

It is an arithmetic number, because the mean of its divisors is an integer number (9309021893850).

Almost surely, 2^{18618043787699} is an apocalyptic number.

18618043787699 is a deficient number, since it is larger than the sum of its proper divisors (1).

18618043787699 is an equidigital number, since it uses as much as digits as its factorization.

18618043787699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 877879296, while the sum is 77.

The spelling of 18618043787699 in words is "eighteen trillion, six hundred eighteen billion, forty-three million, seven hundred eighty-seven thousand, six hundred ninety-nine".