18448709 has 2 divisors, whose sum is σ = 18448710. Its totient is φ = 18448708.

The previous prime is 18448699. The next prime is 18448739. The reversal of 18448709 is 90784481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12460900 + 5987809 = 3530^2 + 2447^2 .

It is a cyclic number.

It is not a de Polignac number, because 18448709 - 2⁸ = 18448453 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 (18448739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9224354 + 9224355.

It is an arithmetic number, because the mean of its divisors is an integer number (9224355).

Almost surely, 2^18448709 is an apocalyptic number.

It is an amenable number.

18448709 is a deficient number, since it is larger than the sum of its proper divisors (1).

18448709 is an equidigital number, since it uses as much as digits as its factorization.

18448709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 18448709 is about 4295.1960374353. The cubic root of 18448709 is about 264.2339762647.

The spelling of 18448709 in words is "eighteen million, four hundred forty-eight thousand, seven hundred nine".