18775201 has 2 divisors, whose sum is σ = 18775202. Its totient is φ = 18775200.

The previous prime is 18775187. The next prime is 18775217. The reversal of 18775201 is 10257781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10394176 + 8381025 = 3224^2 + 2895^2 .

It is an emirp because it is prime and its reverse (10257781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18775201 - 2⁷ = 18775073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18775261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9387600 + 9387601.

It is an arithmetic number, because the mean of its divisors is an integer number (9387601).

Almost surely, 2^18775201 is an apocalyptic number.

It is an amenable number.

18775201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18775201 is an equidigital number, since it uses as much as digits as its factorization.

18775201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 18775201 is about 4333.0360026199. The cubic root of 18775201 is about 265.7836114939.

The spelling of 18775201 in words is "eighteen million, seven hundred seventy-five thousand, two hundred one".