18134849 has 2 divisors, whose sum is σ = 18134850. Its totient is φ = 18134848.

The previous prime is 18134839. The next prime is 18134867. The reversal of 18134849 is 94843181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13542400 + 4592449 = 3680^2 + 2143^2 .

It is an emirp because it is prime and its reverse (94843181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18134849 - 2⁸ = 18134593 is a prime.

It is not a weakly prime, because it can be changed into another prime (18134819) 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, 9067424 + 9067425.

It is an arithmetic number, because the mean of its divisors is an integer number (9067425).

Almost surely, 2^18134849 is an apocalyptic number.

It is an amenable number.

18134849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18134849 is an equidigital number, since it uses as much as digits as its factorization.

18134849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 18134849 is about 4258.5031407761. The cubic root of 18134849 is about 262.7269643994.

The spelling of 18134849 in words is "eighteen million, one hundred thirty-four thousand, eight hundred forty-nine".