18449069 has 2 divisors, whose sum is σ = 18449070. Its totient is φ = 18449068.

The previous prime is 18449027. The next prime is 18449089. The reversal of 18449069 is 96094481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15507844 + 2941225 = 3938^2 + 1715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18449069 is a prime.

It is a super-2 number, since 2×18449069² = 680736293933522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18449089) 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, 9224534 + 9224535.

It is an arithmetic number, because the mean of its divisors is an integer number (9224535).

Almost surely, 2^18449069 is an apocalyptic number.

It is an amenable number.

18449069 is a deficient number, since it is larger than the sum of its proper divisors (1).

18449069 is an equidigital number, since it uses as much as digits as its factorization.

18449069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 18449069 is about 4295.2379445148. The cubic root of 18449069 is about 264.2356949688.

The spelling of 18449069 in words is "eighteen million, four hundred forty-nine thousand, sixty-nine".