20324543 has 4 divisors (see below), whose sum is σ = 20514600. Its totient is φ = 20134488.

The previous prime is 20324527. The next prime is 20324573. The reversal of 20324543 is 34542302.

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

It is a cyclic number.

It is not a de Polignac number, because 20324543 - 2⁴ = 20324527 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 (20324573) 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, 94868 + ... + 95081.

It is an arithmetic number, because the mean of its divisors is an integer number (5128650).

Almost surely, 2^20324543 is an apocalyptic number.

20324543 is a deficient number, since it is larger than the sum of its proper divisors (190057).

20324543 is a wasteful number, since it uses less digits than its factorization.

20324543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190056.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20324543 is about 4508.2749472498. The cubic root of 20324543 is about 272.9021327562.

Adding to 20324543 its reverse (34542302), we get a palindrome (54866845).

The spelling of 20324543 in words is "twenty million, three hundred twenty-four thousand, five hundred forty-three".