18333684349 has 4 divisors (see below), whose sum is σ = 18334062720. Its totient is φ = 18333305980.

The previous prime is 18333684277. The next prime is 18333684389. The reversal of 18333684349 is 94348633381.

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 18333684349 - 2²⁵ = 18300129917 is a prime.

It is a super-2 number, since 2×18333684349² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18333684296 and 18333684305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18333684389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103597 + ... + 217714.

It is an arithmetic number, because the mean of its divisors is an integer number (4583515680).

Almost surely, 2^18333684349 is an apocalyptic number.

It is an amenable number.

18333684349 is a deficient number, since it is larger than the sum of its proper divisors (378371).

18333684349 is an equidigital number, since it uses as much as digits as its factorization.

18333684349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378370.

The product of its digits is 4478976, while the sum is 52.

The spelling of 18333684349 in words is "eighteen billion, three hundred thirty-three million, six hundred eighty-four thousand, three hundred forty-nine".