18103201 has 2 divisors, whose sum is σ = 18103202. Its totient is φ = 18103200.

The previous prime is 18103193. The next prime is 18103237. The reversal of 18103201 is 10230181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17438976 + 664225 = 4176^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 18103201 - 2³ = 18103193 is a prime.

It is not a weakly prime, because it can be changed into another prime (18103271) 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, 9051600 + 9051601.

It is an arithmetic number, because the mean of its divisors is an integer number (9051601).

Almost surely, 2^18103201 is an apocalyptic number.

It is an amenable number.

18103201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18103201 is an equidigital number, since it uses as much as digits as its factorization.

18103201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 18103201 is about 4254.7856585262. The cubic root of 18103201 is about 262.5740429073.

Adding to 18103201 its reverse (10230181), we get a palindrome (28333382).

The spelling of 18103201 in words is "eighteen million, one hundred three thousand, two hundred one".