18049247 has 2 divisors, whose sum is σ = 18049248. Its totient is φ = 18049246.

The previous prime is 18049237. The next prime is 18049261. The reversal of 18049247 is 74294081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18049247 - 2⁴ = 18049231 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18049237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9024623 + 9024624.

It is an arithmetic number, because the mean of its divisors is an integer number (9024624).

Almost surely, 2^18049247 is an apocalyptic number.

18049247 is a deficient number, since it is larger than the sum of its proper divisors (1).

18049247 is an equidigital number, since it uses as much as digits as its factorization.

18049247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 18049247 is about 4248.4405374208. The cubic root of 18049247 is about 262.3129285438.

The spelling of 18049247 in words is "eighteen million, forty-nine thousand, two hundred forty-seven".