18814249 has 2 divisors, whose sum is σ = 18814250. Its totient is φ = 18814248.

The previous prime is 18814247. The next prime is 18814261. The reversal of 18814249 is 94241881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18429849 + 384400 = 4293^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 18814249 - 2¹ = 18814247 is a prime.

Together with 18814247, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18814247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9407124 + 9407125.

It is an arithmetic number, because the mean of its divisors is an integer number (9407125).

Almost surely, 2^18814249 is an apocalyptic number.

It is an amenable number.

18814249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18814249 is an equidigital number, since it uses as much as digits as its factorization.

18814249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 37.

The square root of 18814249 is about 4337.5395099065. The cubic root of 18814249 is about 265.9677396948.

It can be divided in two parts, 188142 and 49, that added together give a triangular number (188191 = T₆₁₃).

The spelling of 18814249 in words is "eighteen million, eight hundred fourteen thousand, two hundred forty-nine".