18448447 has 2 divisors, whose sum is σ = 18448448. Its totient is φ = 18448446.

The previous prime is 18448429. The next prime is 18448453. The reversal of 18448447 is 74484481.

It is a strong prime.

It is an emirp because it is prime and its reverse (74484481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18448447 - 2¹¹ = 18446399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18488447) 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, 9224223 + 9224224.

It is an arithmetic number, because the mean of its divisors is an integer number (9224224).

Almost surely, 2^18448447 is an apocalyptic number.

18448447 is a deficient number, since it is larger than the sum of its proper divisors (1).

18448447 is an equidigital number, since it uses as much as digits as its factorization.

18448447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114688, while the sum is 40.

The square root of 18448447 is about 4295.1655381370. The cubic root of 18448447 is about 264.2327254160.

It can be divided in two parts, 1 and 8448447, that added together give a palindrome (8448448).

The spelling of 18448447 in words is "eighteen million, four hundred forty-eight thousand, four hundred forty-seven".