18340829 has 4 divisors (see below), whose sum is σ = 19751676. Its totient is φ = 16929984.

The previous prime is 18340813. The next prime is 18340849. The reversal of 18340829 is 92804381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92804381 = 79 ⋅1174739.

It can be written as a sum of positive squares in 2 ways, for example, as 9796900 + 8543929 = 3130^2 + 2923^2 .

It is a cyclic number.

It is not a de Polignac number, because 18340829 - 2⁴ = 18340813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705404 + ... + 705429.

It is an arithmetic number, because the mean of its divisors is an integer number (4937919).

Almost surely, 2^18340829 is an apocalyptic number.

It is an amenable number.

18340829 is a deficient number, since it is larger than the sum of its proper divisors (1410847).

18340829 is a wasteful number, since it uses less digits than its factorization.

18340829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410846.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18340829 is about 4282.6194087264. The cubic root of 18340829 is about 263.7179274134.

The spelling of 18340829 in words is "eighteen million, three hundred forty thousand, eight hundred twenty-nine".