18118219 has 8 divisors (see below), whose sum is σ = 20776448. Its totient is φ = 15477480.

The previous prime is 18118213. The next prime is 18118223. The reversal of 18118219 is 91281181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18118219 - 2³ = 18118211 is a prime.

It is a super-2 number, since 2×18118219² = 656539719463922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18118211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2067 + ... + 6364.

It is an arithmetic number, because the mean of its divisors is an integer number (2597056).

Almost surely, 2^18118219 is an apocalyptic number.

18118219 is a deficient number, since it is larger than the sum of its proper divisors (2658229).

18118219 is an equidigital number, since it uses as much as digits as its factorization.

18118219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8745.

The product of its digits is 1152, while the sum is 31.

The square root of 18118219 is about 4256.5501289190. The cubic root of 18118219 is about 262.6466313047.

The spelling of 18118219 in words is "eighteen million, one hundred eighteen thousand, two hundred nineteen".