18214277 has 2 divisors, whose sum is σ = 18214278. Its totient is φ = 18214276.

The previous prime is 18214247. The next prime is 18214279. The reversal of 18214277 is 77241281.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 185761 = 4246^2 + 431^2 .

It is a cyclic number.

It is not a de Polignac number, because 18214277 - 2¹⁰ = 18213253 is a prime.

Together with 18214279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18214279) 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, 9107138 + 9107139.

It is an arithmetic number, because the mean of its divisors is an integer number (9107139).

Almost surely, 2^18214277 is an apocalyptic number.

It is an amenable number.

18214277 is a deficient number, since it is larger than the sum of its proper divisors (1).

18214277 is an equidigital number, since it uses as much as digits as its factorization.

18214277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 32.

The square root of 18214277 is about 4267.8187637246. The cubic root of 18214277 is about 263.1099743923.

The spelling of 18214277 in words is "eighteen million, two hundred fourteen thousand, two hundred seventy-seven".