18148873 has 2 divisors, whose sum is σ = 18148874. Its totient is φ = 18148872.

The previous prime is 18148861. The next prime is 18148901. The reversal of 18148873 is 37884181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16867449 + 1281424 = 4107^2 + 1132^2 .

It is an emirp because it is prime and its reverse (37884181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18148873 - 2¹⁷ = 18017801 is a prime.

It is not a weakly prime, because it can be changed into another prime (18148853) 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, 9074436 + 9074437.

It is an arithmetic number, because the mean of its divisors is an integer number (9074437).

Almost surely, 2^18148873 is an apocalyptic number.

It is an amenable number.

18148873 is a deficient number, since it is larger than the sum of its proper divisors (1).

18148873 is an equidigital number, since it uses as much as digits as its factorization.

18148873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 40.

The square root of 18148873 is about 4260.1494105254. The cubic root of 18148873 is about 262.7946707549.

The spelling of 18148873 in words is "eighteen million, one hundred forty-eight thousand, eight hundred seventy-three".