18436214 has 4 divisors (see below), whose sum is σ = 27654324. Its totient is φ = 9218106.

The previous prime is 18436193. The next prime is 18436241. The reversal of 18436214 is 41263481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41263481 = 7 ⋅5894783.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4609052 + ... + 4609055.

It is an arithmetic number, because the mean of its divisors is an integer number (6913581).

Almost surely, 2^18436214 is an apocalyptic number.

18436214 is a deficient number, since it is larger than the sum of its proper divisors (9218110).

18436214 is an equidigital number, since it uses as much as digits as its factorization.

18436214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9218109.

The product of its digits is 4608, while the sum is 29.

The square root of 18436214 is about 4293.7412590886. The cubic root of 18436214 is about 264.1743090510.

Adding to 18436214 its reverse (41263481), we get a palindrome (59699695).

The spelling of 18436214 in words is "eighteen million, four hundred thirty-six thousand, two hundred fourteen".