20142244 has 12 divisors (see below), whose sum is σ = 35613004. Its totient is φ = 9967104.

The previous prime is 20142209. The next prime is 20142247. The reversal of 20142244 is 44224102.

It can be written as a sum of positive squares in 2 ways, for example, as 9000000 + 11142244 = 3000^2 + 3338^2 .

It is not an unprimeable number, because it can be changed into a prime (20142247) 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, 25569 + ... + 26344.

Almost surely, 2^20142244 is an apocalyptic number.

It is an amenable number.

20142244 is a deficient number, since it is larger than the sum of its proper divisors (15470760).

20142244 is a wasteful number, since it uses less digits than its factorization.

20142244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52014 (or 52012 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 20142244 is about 4488.0111408061. The cubic root of 20142244 is about 272.0837580866.

Adding to 20142244 its reverse (44224102), we get a palindrome (64366346).

The spelling of 20142244 in words is "twenty million, one hundred forty-two thousand, two hundred forty-four".