18334909 has 2 divisors, whose sum is σ = 18334910. Its totient is φ = 18334908.

The previous prime is 18334903. The next prime is 18334951. The reversal of 18334909 is 90943381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15602500 + 2732409 = 3950^2 + 1653^2 .

It is a cyclic number.

It is not a de Polignac number, because 18334909 - 2⁹ = 18334397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18334903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9167454 + 9167455.

It is an arithmetic number, because the mean of its divisors is an integer number (9167455).

Almost surely, 2^18334909 is an apocalyptic number.

It is an amenable number.

18334909 is a deficient number, since it is larger than the sum of its proper divisors (1).

18334909 is an equidigital number, since it uses as much as digits as its factorization.

18334909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 18334909 is about 4281.9281871605. The cubic root of 18334909 is about 263.6895503221.

The spelling of 18334909 in words is "eighteen million, three hundred thirty-four thousand, nine hundred nine".