18349845858233 has 2 divisors, whose sum is σ = 18349845858234. Its totient is φ = 18349845858232.

The previous prime is 18349845858209. The next prime is 18349845858271. The reversal of 18349845858233 is 33285854894381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13961671387024 + 4388174471209 = 3736532^2 + 2094797^2 .

It is an emirp because it is prime and its reverse (33285854894381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18349845858233 - 2²² = 18349841663929 is a prime.

It is not a weakly prime, because it can be changed into another prime (18349845858283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9174922929116 + 9174922929117.

It is an arithmetic number, because the mean of its divisors is an integer number (9174922929117).

Almost surely, 2^{18349845858233} is an apocalyptic number.

It is an amenable number.

18349845858233 is a deficient number, since it is larger than the sum of its proper divisors (1).

18349845858233 is an equidigital number, since it uses as much as digits as its factorization.

18349845858233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 796262400, while the sum is 71.

The spelling of 18349845858233 in words is "eighteen trillion, three hundred forty-nine billion, eight hundred forty-five million, eight hundred fifty-eight thousand, two hundred thirty-three".