18227941 has 2 divisors, whose sum is σ = 18227942. Its totient is φ = 18227940.

The previous prime is 18227933. The next prime is 18227947. The reversal of 18227941 is 14972281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 7403841 = 3290^2 + 2721^2 .

It is an emirp because it is prime and its reverse (14972281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18227941 - 2³ = 18227933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18227897 and 18227906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18227947) 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, 9113970 + 9113971.

It is an arithmetic number, because the mean of its divisors is an integer number (9113971).

Almost surely, 2^18227941 is an apocalyptic number.

It is an amenable number.

18227941 is a deficient number, since it is larger than the sum of its proper divisors (1).

18227941 is an equidigital number, since it uses as much as digits as its factorization.

18227941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 18227941 is about 4269.4192813543. The cubic root of 18227941 is about 263.1757512929.

The spelling of 18227941 in words is "eighteen million, two hundred twenty-seven thousand, nine hundred forty-one".