18287057 has 2 divisors, whose sum is σ = 18287058. Its totient is φ = 18287056.

The previous prime is 18287051. The next prime is 18287077. The reversal of 18287057 is 75078281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11296321 + 6990736 = 3361^2 + 2644^2 .

It is an emirp because it is prime and its reverse (75078281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18287057 - 2⁴ = 18287041 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18287057.

It is not a weakly prime, because it can be changed into another prime (18287051) 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, 9143528 + 9143529.

It is an arithmetic number, because the mean of its divisors is an integer number (9143529).

Almost surely, 2^18287057 is an apocalyptic number.

It is an amenable number.

18287057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18287057 is an equidigital number, since it uses as much as digits as its factorization.

18287057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 18287057 is about 4276.3368669926. The cubic root of 18287057 is about 263.4599506816.

The spelling of 18287057 in words is "eighteen million, two hundred eighty-seven thousand, fifty-seven".