18342219 has 12 divisors (see below), whose sum is σ = 28449384. Its totient is φ = 10481184.

The previous prime is 18342217. The next prime is 18342223. The reversal of 18342219 is 91224381.

It is not a de Polignac number, because 18342219 - 2¹ = 18342217 is a prime.

It is a super-2 number, since 2×18342219² = 672873995687922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18342217) 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 11 ways as a sum of consecutive naturals, for example, 62242 + ... + 62535.

It is an arithmetic number, because the mean of its divisors is an integer number (2370782).

Almost surely, 2^18342219 is an apocalyptic number.

18342219 is a deficient number, since it is larger than the sum of its proper divisors (10107165).

18342219 is a wasteful number, since it uses less digits than its factorization.

18342219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124794 (or 124787 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 18342219 is about 4282.7816895098. The cubic root of 18342219 is about 263.7245893925.

The spelling of 18342219 in words is "eighteen million, three hundred forty-two thousand, two hundred nineteen".