18382729219 has 4 divisors (see below), whose sum is σ = 18383063560. Its totient is φ = 18382394880.

The previous prime is 18382729217. The next prime is 18382729229. The reversal of 18382729219 is 91292728381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18382729219 - 2¹ = 18382729217 is a prime.

It is a super-2 number, since 2×18382729219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18382729213) 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 in 3 ways as a sum of consecutive naturals, for example, 63102 + ... + 201859.

It is an arithmetic number, because the mean of its divisors is an integer number (4595765890).

Almost surely, 2^18382729219 is an apocalyptic number.

18382729219 is a deficient number, since it is larger than the sum of its proper divisors (334341).

18382729219 is an equidigital number, since it uses as much as digits as its factorization.

18382729219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334340.

The product of its digits is 870912, while the sum is 52.

The spelling of 18382729219 in words is "eighteen billion, three hundred eighty-two million, seven hundred twenty-nine thousand, two hundred nineteen".