20243144 has 16 divisors (see below), whose sum is σ = 38982300. Its totient is φ = 9847872.

The previous prime is 20243143. The next prime is 20243149. The reversal of 20243144 is 44134202.

It can be written as a sum of positive squares in 2 ways, for example, as 17222500 + 3020644 = 4150^2 + 1738^2 .

It is not an unprimeable number, because it can be changed into a prime (20243143) 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, 33899 + ... + 34490.

Almost surely, 2^20243144 is an apocalyptic number.

It is an amenable number.

20243144 is a deficient number, since it is larger than the sum of its proper divisors (18739156).

20243144 is a wasteful number, since it uses less digits than its factorization.

20243144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68432 (or 68428 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20243144 is about 4499.2381577329. The cubic root of 20243144 is about 272.5373245173.

Adding to 20243144 its reverse (44134202), we get a palindrome (64377346).

The spelling of 20243144 in words is "twenty million, two hundred forty-three thousand, one hundred forty-four".