20324545 has 4 divisors (see below), whose sum is σ = 24389460. Its totient is φ = 16259632.

The previous prime is 20324527. The next prime is 20324573. The reversal of 20324545 is 54542302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14258176 + 6066369 = 3776^2 + 2463^2 .

It is a cyclic number.

It is not a de Polignac number, because 20324545 - 2⁹ = 20324033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032450 + ... + 2032459.

It is an arithmetic number, because the mean of its divisors is an integer number (6097365).

Almost surely, 2^20324545 is an apocalyptic number.

It is an amenable number.

20324545 is a deficient number, since it is larger than the sum of its proper divisors (4064915).

20324545 is an equidigital number, since it uses as much as digits as its factorization.

20324545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064914.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 20324545 is about 4508.2751690641. The cubic root of 20324545 is about 272.9021417077.

Adding to 20324545 its reverse (54542302), we get a palindrome (74866847).

The spelling of 20324545 in words is "twenty million, three hundred twenty-four thousand, five hundred forty-five".