18367201 has 2 divisors, whose sum is σ = 18367202. Its totient is φ = 18367200.

The previous prime is 18367199. The next prime is 18367211. The reversal of 18367201 is 10276381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14622976 + 3744225 = 3824^2 + 1935^2 .

It is a cyclic number.

It is not a de Polignac number, because 18367201 - 2¹ = 18367199 is a prime.

Together with 18367199, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18367201.

It is not a weakly prime, because it can be changed into another prime (18367211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9183600 + 9183601.

It is an arithmetic number, because the mean of its divisors is an integer number (9183601).

Almost surely, 2^18367201 is an apocalyptic number.

It is an amenable number.

18367201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18367201 is an equidigital number, since it uses as much as digits as its factorization.

18367201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 18367201 is about 4285.6972594900. The cubic root of 18367201 is about 263.8442655496.

The spelling of 18367201 in words is "eighteen million, three hundred sixty-seven thousand, two hundred one".