18484447 has 2 divisors, whose sum is σ = 18484448. Its totient is φ = 18484446.

The previous prime is 18484441. The next prime is 18484519. The reversal of 18484447 is 74448481.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18484447 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18484441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242223 + 9242224.

It is an arithmetic number, because the mean of its divisors is an integer number (9242224).

Almost surely, 2^18484447 is an apocalyptic number.

18484447 is a deficient number, since it is larger than the sum of its proper divisors (1).

18484447 is an equidigital number, since it uses as much as digits as its factorization.

18484447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114688, while the sum is 40.

The square root of 18484447 is about 4299.3542538386. The cubic root of 18484447 is about 264.4044868906.

The spelling of 18484447 in words is "eighteen million, four hundred eighty-four thousand, four hundred forty-seven".