18334009 has 2 divisors, whose sum is σ = 18334010. Its totient is φ = 18334008.

The previous prime is 18333983. The next prime is 18334027. The reversal of 18334009 is 90043381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17977600 + 356409 = 4240^2 + 597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18334009 is a prime.

It is a super-2 number, since 2×18334009² = 672271772024162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18334909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9167004 + 9167005.

It is an arithmetic number, because the mean of its divisors is an integer number (9167005).

Almost surely, 2^18334009 is an apocalyptic number.

It is an amenable number.

18334009 is a deficient number, since it is larger than the sum of its proper divisors (1).

18334009 is an equidigital number, since it uses as much as digits as its factorization.

18334009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 18334009 is about 4281.8230930294. The cubic root of 18334009 is about 263.6852357024.

The spelling of 18334009 in words is "eighteen million, three hundred thirty-four thousand, nine".