20324569 has 4 divisors (see below), whose sum is σ = 20335744. Its totient is φ = 20313396.

The previous prime is 20324527. The next prime is 20324573. The reversal of 20324569 is 96542302.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96542302 = 2 ⋅48271151.

It is a cyclic number.

It is not a de Polignac number, because 20324569 - 2¹¹ = 20322521 is a prime.

It is a super-2 number, since 2×20324569² = 826176210071522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20324569.

It is not an unprimeable number, because it can be changed into a prime (20324869) 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, 2157 + ... + 6730.

It is an arithmetic number, because the mean of its divisors is an integer number (5083936).

Almost surely, 2^20324569 is an apocalyptic number.

It is an amenable number.

20324569 is a deficient number, since it is larger than the sum of its proper divisors (11175).

20324569 is an equidigital number, since it uses as much as digits as its factorization.

20324569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11174.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 20324569 is about 4508.2778308352. The cubic root of 20324569 is about 272.9022491254.

The spelling of 20324569 in words is "twenty million, three hundred twenty-four thousand, five hundred sixty-nine".