18140219 has 2 divisors, whose sum is σ = 18140220. Its totient is φ = 18140218.

The previous prime is 18140203. The next prime is 18140267. The reversal of 18140219 is 91204181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18140219 - 2⁴ = 18140203 is a prime.

It is a super-2 number, since 2×18140219² = 658135090735922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18140519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9070109 + 9070110.

It is an arithmetic number, because the mean of its divisors is an integer number (9070110).

Almost surely, 2^18140219 is an apocalyptic number.

18140219 is a deficient number, since it is larger than the sum of its proper divisors (1).

18140219 is an equidigital number, since it uses as much as digits as its factorization.

18140219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 18140219 is about 4259.1335973411. The cubic root of 18140219 is about 262.7528943013.

The spelling of 18140219 in words is "eighteen million, one hundred forty thousand, two hundred nineteen".