18214811 has 2 divisors, whose sum is σ = 18214812. Its totient is φ = 18214810.

The previous prime is 18214799. The next prime is 18214849. The reversal of 18214811 is 11841281.

It is a weak prime.

It is an emirp because it is prime and its reverse (11841281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18214811 - 2⁶ = 18214747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18214111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9107405 + 9107406.

It is an arithmetic number, because the mean of its divisors is an integer number (9107406).

Almost surely, 2^18214811 is an apocalyptic number.

18214811 is a deficient number, since it is larger than the sum of its proper divisors (1).

18214811 is an equidigital number, since it uses as much as digits as its factorization.

18214811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 26.

The square root of 18214811 is about 4267.8813244981. The cubic root of 18214811 is about 263.1125456235.

The spelling of 18214811 in words is "eighteen million, two hundred fourteen thousand, eight hundred eleven".