16818449 has 2 divisors, whose sum is σ = 16818450. Its totient is φ = 16818448.

The previous prime is 16818443. The next prime is 16818467. The reversal of 16818449 is 94481861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 6927424 = 3145^2 + 2632^2 .

It is a cyclic number.

It is not a de Polignac number, because 16818449 - 2¹⁶ = 16752913 is a prime.

It is not a weakly prime, because it can be changed into another prime (16818443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8409224 + 8409225.

It is an arithmetic number, because the mean of its divisors is an integer number (8409225).

Almost surely, 2^16818449 is an apocalyptic number.

It is an amenable number.

16818449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16818449 is an equidigital number, since it uses as much as digits as its factorization.

16818449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 41.

The square root of 16818449 is about 4101.0302364162. The cubic root of 16818449 is about 256.2095503077.

The spelling of 16818449 in words is "sixteen million, eight hundred eighteen thousand, four hundred forty-nine".