18163953219 has 4 divisors (see below), whose sum is σ = 24218604296. Its totient is φ = 12109302144.

The previous prime is 18163953211. The next prime is 18163953271. The reversal of 18163953219 is 91235936181.

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

It is not a de Polignac number, because 18163953219 - 2³ = 18163953211 is a prime.

It is a super-2 number, since 2×18163953219² (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 (18163953211) 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, 3027325534 + ... + 3027325539.

It is an arithmetic number, because the mean of its divisors is an integer number (6054651074).

Almost surely, 2^18163953219 is an apocalyptic number.

18163953219 is a deficient number, since it is larger than the sum of its proper divisors (6054651077).

18163953219 is an equidigital number, since it uses as much as digits as its factorization.

18163953219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054651076.

The product of its digits is 349920, while the sum is 48.

The spelling of 18163953219 in words is "eighteen billion, one hundred sixty-three million, nine hundred fifty-three thousand, two hundred nineteen".