18455201 has 2 divisors, whose sum is σ = 18455202. Its totient is φ = 18455200.

The previous prime is 18455197. The next prime is 18455209. The reversal of 18455201 is 10255481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9928801 + 8526400 = 3151^2 + 2920^2 .

It is an emirp because it is prime and its reverse (10255481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18455201 - 2² = 18455197 is a prime.

It is not a weakly prime, because it can be changed into another prime (18455209) 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, 9227600 + 9227601.

It is an arithmetic number, because the mean of its divisors is an integer number (9227601).

Almost surely, 2^18455201 is an apocalyptic number.

It is an amenable number.

18455201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18455201 is an equidigital number, since it uses as much as digits as its factorization.

18455201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 18455201 is about 4295.9516989836. The cubic root of 18455201 is about 264.2649667945.

The spelling of 18455201 in words is "eighteen million, four hundred fifty-five thousand, two hundred one".