20304329 has 4 divisors (see below), whose sum is σ = 20736384. Its totient is φ = 19872276.

The previous prime is 20304313. The next prime is 20304413. The reversal of 20304329 is 92340302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92340302 = 2 ⋅46170151.

It is a cyclic number.

It is not a de Polignac number, because 20304329 - 2⁴ = 20304313 is a prime.

It is a super-2 number, since 2×20304329² = 824531552280482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20304029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215957 + ... + 216050.

It is an arithmetic number, because the mean of its divisors is an integer number (5184096).

Almost surely, 2^20304329 is an apocalyptic number.

It is an amenable number.

20304329 is a deficient number, since it is larger than the sum of its proper divisors (432055).

20304329 is an equidigital number, since it uses as much as digits as its factorization.

20304329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432054.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20304329 is about 4506.0325120887. The cubic root of 20304329 is about 272.8116301303.

The spelling of 20304329 in words is "twenty million, three hundred four thousand, three hundred twenty-nine".