18648241 has 2 divisors, whose sum is σ = 18648242. Its totient is φ = 18648240.

The previous prime is 18648229. The next prime is 18648263. The reversal of 18648241 is 14284681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12222016 + 6426225 = 3496^2 + 2535^2 .

It is a cyclic number.

It is not a de Polignac number, because 18648241 - 2¹⁵ = 18615473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18648197 and 18648206.

It is not a weakly prime, because it can be changed into another prime (18648211) 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, 9324120 + 9324121.

It is an arithmetic number, because the mean of its divisors is an integer number (9324121).

Almost surely, 2^18648241 is an apocalyptic number.

It is an amenable number.

18648241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18648241 is an equidigital number, since it uses as much as digits as its factorization.

18648241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 34.

The square root of 18648241 is about 4318.3609159032. The cubic root of 18648241 is about 265.1831699093.

The spelling of 18648241 in words is "eighteen million, six hundred forty-eight thousand, two hundred forty-one".