18334185917 has 4 divisors (see below), whose sum is σ = 18335117856. Its totient is φ = 18333253980.

The previous prime is 18334185841. The next prime is 18334185967. The reversal of 18334185917 is 71958143381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18334185917 - 2¹⁴ = 18334169533 is a prime.

It is a super-2 number, since 2×18334185917² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18334185967) 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 in 3 ways as a sum of consecutive naturals, for example, 435809 + ... + 476022.

It is an arithmetic number, because the mean of its divisors is an integer number (4583779464).

Almost surely, 2^18334185917 is an apocalyptic number.

It is an amenable number.

18334185917 is a deficient number, since it is larger than the sum of its proper divisors (931939).

18334185917 is an equidigital number, since it uses as much as digits as its factorization.

18334185917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931938.

The product of its digits is 725760, while the sum is 50.

The spelling of 18334185917 in words is "eighteen billion, three hundred thirty-four million, one hundred eighty-five thousand, nine hundred seventeen".