18112834417 has 2 divisors, whose sum is σ = 18112834418. Its totient is φ = 18112834416.

The previous prime is 18112834393. The next prime is 18112834477. The reversal of 18112834417 is 71443821181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14540501056 + 3572333361 = 120584^2 + 59769^2 .

It is a cyclic number.

It is not a de Polignac number, because 18112834417 - 2¹⁵ = 18112801649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18112834417.

It is not a weakly prime, because it can be changed into another prime (18112834477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9056417208 + 9056417209.

It is an arithmetic number, because the mean of its divisors is an integer number (9056417209).

Almost surely, 2^18112834417 is an apocalyptic number.

It is an amenable number.

18112834417 is a deficient number, since it is larger than the sum of its proper divisors (1).

18112834417 is an equidigital number, since it uses as much as digits as its factorization.

18112834417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 40.

The spelling of 18112834417 in words is "eighteen billion, one hundred twelve million, eight hundred thirty-four thousand, four hundred seventeen".