18335688841 has 2 divisors, whose sum is σ = 18335688842. Its totient is φ = 18335688840.

The previous prime is 18335688703. The next prime is 18335688887. The reversal of 18335688841 is 14888653381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17694586441 + 641102400 = 133021^2 + 25320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18335688841 is a prime.

It is not a weakly prime, because it can be changed into another prime (18335788841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9167844420 + 9167844421.

It is an arithmetic number, because the mean of its divisors is an integer number (9167844421).

Almost surely, 2^18335688841 is an apocalyptic number.

It is an amenable number.

18335688841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18335688841 is an equidigital number, since it uses as much as digits as its factorization.

18335688841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4423680, while the sum is 55.

The spelling of 18335688841 in words is "eighteen billion, three hundred thirty-five million, six hundred eighty-eight thousand, eight hundred forty-one".