20330144 has 12 divisors (see below), whose sum is σ = 40025034. Its totient is φ = 10165056.

The previous prime is 20330143. The next prime is 20330153. The reversal of 20330144 is 44103302.

It can be written as a sum of positive squares in only one way, i.e., 17808400 + 2521744 = 4220^2 + 1588^2 .

It is not an unprimeable number, because it can be changed into a prime (20330143) 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 as a sum of consecutive naturals, namely, 317627 + ... + 317690.

Almost surely, 2^20330144 is an apocalyptic number.

It is an amenable number.

20330144 is a deficient number, since it is larger than the sum of its proper divisors (19694890).

20330144 is an equidigital number, since it uses as much as digits as its factorization.

20330144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635327 (or 635319 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20330144 is about 4508.8960954983. The cubic root of 20330144 is about 272.9271990756.

Adding to 20330144 its reverse (44103302), we get a palindrome (64433446).

The spelling of 20330144 in words is "twenty million, three hundred thirty thousand, one hundred forty-four".