18342529 has 4 divisors (see below), whose sum is σ = 18975060. Its totient is φ = 17710000.

The previous prime is 18342503. The next prime is 18342547. The reversal of 18342529 is 92524381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11916304 + 6426225 = 3452^2 + 2535^2 .

It is a cyclic number.

It is not a de Polignac number, because 18342529 - 2⁵ = 18342497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18342494 and 18342503.

It is not an unprimeable number, because it can be changed into a prime (18342589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316222 + ... + 316279.

It is an arithmetic number, because the mean of its divisors is an integer number (4743765).

Almost surely, 2^18342529 is an apocalyptic number.

It is an amenable number.

18342529 is a deficient number, since it is larger than the sum of its proper divisors (632531).

18342529 is an equidigital number, since it uses as much as digits as its factorization.

18342529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632530.

The product of its digits is 17280, while the sum is 34.

The square root of 18342529 is about 4282.8178807883. The cubic root of 18342529 is about 263.7260751117.

The spelling of 18342529 in words is "eighteen million, three hundred forty-two thousand, five hundred twenty-nine".