18226843 has 2 divisors, whose sum is σ = 18226844. Its totient is φ = 18226842.

The previous prime is 18226807. The next prime is 18226847. The reversal of 18226843 is 34862281.

It is a strong prime.

It is an emirp because it is prime and its reverse (34862281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18226843 - 2⁹ = 18226331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18226799 and 18226808.

It is not a weakly prime, because it can be changed into another prime (18226847) 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 as a sum of consecutive naturals, namely, 9113421 + 9113422.

It is an arithmetic number, because the mean of its divisors is an integer number (9113422).

Almost surely, 2^18226843 is an apocalyptic number.

18226843 is a deficient number, since it is larger than the sum of its proper divisors (1).

18226843 is an equidigital number, since it uses as much as digits as its factorization.

18226843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 18226843 is about 4269.2906905012. The cubic root of 18226843 is about 263.1704668639.

The spelling of 18226843 in words is "eighteen million, two hundred twenty-six thousand, eight hundred forty-three".