18041449 has 2 divisors, whose sum is σ = 18041450. Its totient is φ = 18041448.

The previous prime is 18041383. The next prime is 18041483. The reversal of 18041449 is 94414081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14961424 + 3080025 = 3868^2 + 1755^2 .

It is a cyclic number.

It is not a de Polignac number, because 18041449 - 2¹¹ = 18039401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18041449.

It is not a weakly prime, because it can be changed into another prime (18041489) 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, 9020724 + 9020725.

It is an arithmetic number, because the mean of its divisors is an integer number (9020725).

Almost surely, 2^18041449 is an apocalyptic number.

It is an amenable number.

18041449 is a deficient number, since it is larger than the sum of its proper divisors (1).

18041449 is an equidigital number, since it uses as much as digits as its factorization.

18041449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 18041449 is about 4247.5226897569. The cubic root of 18041449 is about 262.2751465268.

The spelling of 18041449 in words is "eighteen million, forty-one thousand, four hundred forty-nine".