18429329 has 4 divisors (see below), whose sum is σ = 18440484. Its totient is φ = 18418176.

The previous prime is 18429317. The next prime is 18429337. The reversal of 18429329 is 92392481.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92392481 = 1847 ⋅50023.

It can be written as a sum of positive squares in 2 ways, for example, as 6492304 + 11937025 = 2548^2 + 3455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18429329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18429292 and 18429301.

It is not an unprimeable number, because it can be changed into a prime (18429349) 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, 2552 + ... + 6585.

It is an arithmetic number, because the mean of its divisors is an integer number (4610121).

Almost surely, 2^18429329 is an apocalyptic number.

It is an amenable number.

18429329 is a deficient number, since it is larger than the sum of its proper divisors (11155).

18429329 is an equidigital number, since it uses as much as digits as its factorization.

18429329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11154.

The product of its digits is 31104, while the sum is 38.

The square root of 18429329 is about 4292.9394358644. The cubic root of 18429329 is about 264.1414196776.

The spelling of 18429329 in words is "eighteen million, four hundred twenty-nine thousand, three hundred twenty-nine".