20324809 has 8 divisors (see below), whose sum is σ = 22215168. Its totient is φ = 18511680.

The previous prime is 20324789. The next prime is 20324819. The reversal of 20324809 is 90842302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20324809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20324819) 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 7 ways as a sum of consecutive naturals, for example, 18757 + ... + 19810.

It is an arithmetic number, because the mean of its divisors is an integer number (2776896).

Almost surely, 2^20324809 is an apocalyptic number.

It is an amenable number.

20324809 is a deficient number, since it is larger than the sum of its proper divisors (1890359).

20324809 is a wasteful number, since it uses less digits than its factorization.

20324809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38615.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20324809 is about 4508.3044484595. The cubic root of 20324809 is about 272.9033232979.

The spelling of 20324809 in words is "twenty million, three hundred twenty-four thousand, eight hundred nine".