18984233 has 2 divisors, whose sum is σ = 18984234. Its totient is φ = 18984232.

The previous prime is 18984187. The next prime is 18984281. The reversal of 18984233 is 33248981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18983449 + 784 = 4357^2 + 28^2 .

It is a cyclic number.

It is not a de Polignac number, because 18984233 - 2¹⁸ = 18722089 is a prime.

It is a super-2 number, since 2×18984233² = 720802205196578, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18984533) by changing a digit.

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, 9492116 + 9492117.

It is an arithmetic number, because the mean of its divisors is an integer number (9492117).

Almost surely, 2^18984233 is an apocalyptic number.

It is an amenable number.

18984233 is a deficient number, since it is larger than the sum of its proper divisors (1).

18984233 is an equidigital number, since it uses as much as digits as its factorization.

18984233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 18984233 is about 4357.0899692341. The cubic root of 18984233 is about 266.7663327107.

The spelling of 18984233 in words is "eighteen million, nine hundred eighty-four thousand, two hundred thirty-three".