18134009 has 2 divisors, whose sum is σ = 18134010. Its totient is φ = 18134008.

The previous prime is 18133993. The next prime is 18134023. The reversal of 18134009 is 90043181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11580409 + 6553600 = 3403^2 + 2560^2 .

It is an emirp because it is prime and its reverse (90043181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18134009 - 2⁴ = 18133993 is a prime.

It is not a weakly prime, because it can be changed into another prime (18134069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9067004 + 9067005.

It is an arithmetic number, because the mean of its divisors is an integer number (9067005).

Almost surely, 2^18134009 is an apocalyptic number.

It is an amenable number.

18134009 is a deficient number, since it is larger than the sum of its proper divisors (1).

18134009 is an equidigital number, since it uses as much as digits as its factorization.

18134009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18134009 is about 4258.4045134299. The cubic root of 18134009 is about 262.7229078625.

The spelling of 18134009 in words is "eighteen million, one hundred thirty-four thousand, nine".