18485449 has 2 divisors, whose sum is σ = 18485450. Its totient is φ = 18485448.

The previous prime is 18485431. The next prime is 18485473. The reversal of 18485449 is 94458481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10465225 + 8020224 = 3235^2 + 2832^2 .

It is a cyclic number.

It is not a de Polignac number, because 18485449 - 2⁵ = 18485417 is a prime.

It is not a weakly prime, because it can be changed into another prime (18485479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242724 + 9242725.

It is an arithmetic number, because the mean of its divisors is an integer number (9242725).

Almost surely, 2^18485449 is an apocalyptic number.

It is an amenable number.

18485449 is a deficient number, since it is larger than the sum of its proper divisors (1).

18485449 is an equidigital number, since it uses as much as digits as its factorization.

18485449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 43.

The square root of 18485449 is about 4299.4707813869. The cubic root of 18485449 is about 264.4092643937.

The spelling of 18485449 in words is "eighteen million, four hundred eighty-five thousand, four hundred forty-nine".