20324240 has 20 divisors (see below), whose sum is σ = 47254044. Its totient is φ = 8129664.

The previous prime is 20324237. The next prime is 20324267. The reversal of 20324240 is 4242302.

It can be written as a sum of positive squares in 2 ways, for example, as 5914624 + 14409616 = 2432^2 + 3796^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 126947 + ... + 127106.

Almost surely, 2^20324240 is an apocalyptic number.

20324240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20324240 is an abundant number, since it is smaller than the sum of its proper divisors (26929804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20324240 is a wasteful number, since it uses less digits than its factorization.

20324240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254066 (or 254060 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20324240 is about 4508.2413422531. The cubic root of 20324240 is about 272.9007766001.

Adding to 20324240 its reverse (4242302), we get a palindrome (24566542).

The spelling of 20324240 in words is "twenty million, three hundred twenty-four thousand, two hundred forty".