20324285 has 16 divisors (see below), whose sum is σ = 25473072. Its totient is φ = 15552000.

The previous prime is 20324267. The next prime is 20324323. The reversal of 20324285 is 58242302.

It can be written as a sum of positive squares in 8 ways, for example, as 2439844 + 17884441 = 1562^2 + 4229^2 .

It is not a de Polignac number, because 20324285 - 2⁶ = 20324221 is a prime.

It is a super-2 number, since 2×20324285² = 826153121522450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10385 + ... + 12185.

It is an arithmetic number, because the mean of its divisors is an integer number (1592067).

Almost surely, 2^20324285 is an apocalyptic number.

It is an amenable number.

20324285 is a deficient number, since it is larger than the sum of its proper divisors (5148787).

20324285 is a wasteful number, since it uses less digits than its factorization.

20324285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20324285 is about 4508.2463331100. The cubic root of 20324285 is about 272.9009780103.

Adding to 20324285 its reverse (58242302), we get a palindrome (78566587).

The spelling of 20324285 in words is "twenty million, three hundred twenty-four thousand, two hundred eighty-five".