18606361 has 2 divisors, whose sum is σ = 18606362. Its totient is φ = 18606360.

The previous prime is 18606319. The next prime is 18606373. The reversal of 18606361 is 16360681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17272336 + 1334025 = 4156^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 18606361 - 2²¹ = 16509209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18606311) 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, 9303180 + 9303181.

It is an arithmetic number, because the mean of its divisors is an integer number (9303181).

Almost surely, 2^18606361 is an apocalyptic number.

It is an amenable number.

18606361 is a deficient number, since it is larger than the sum of its proper divisors (1).

18606361 is an equidigital number, since it uses as much as digits as its factorization.

18606361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 18606361 is about 4313.5091283084. The cubic root of 18606361 is about 264.9845060361.

The spelling of 18606361 in words is "eighteen million, six hundred six thousand, three hundred sixty-one".