18288329 has 2 divisors, whose sum is σ = 18288330. Its totient is φ = 18288328.

The previous prime is 18288313. The next prime is 18288341. The reversal of 18288329 is 92388281.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14478025 + 3810304 = 3805^2 + 1952^2 .

It is an emirp because it is prime and its reverse (92388281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18288329 - 2⁴ = 18288313 is a prime.

It is a super-2 number, since 2×18288329² = 668925955224482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18288359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9144164 + 9144165.

It is an arithmetic number, because the mean of its divisors is an integer number (9144165).

Almost surely, 2^18288329 is an apocalyptic number.

It is an amenable number.

18288329 is a deficient number, since it is larger than the sum of its proper divisors (1).

18288329 is an equidigital number, since it uses as much as digits as its factorization.

18288329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 41.

The square root of 18288329 is about 4276.4855898272. The cubic root of 18288329 is about 263.4660590691.

The spelling of 18288329 in words is "eighteen million, two hundred eighty-eight thousand, three hundred twenty-nine".