20144243 has 24 divisors (see below), whose sum is σ = 24744384. Its totient is φ = 16329600.

The previous prime is 20144239. The next prime is 20144249. The reversal of 20144243 is 34244102.

It is not a de Polignac number, because 20144243 - 2² = 20144239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20144249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74198 + ... + 74468.

It is an arithmetic number, because the mean of its divisors is an integer number (1031016).

Almost surely, 2^20144243 is an apocalyptic number.

20144243 is a deficient number, since it is larger than the sum of its proper divisors (4600141).

20144243 is a wasteful number, since it uses less digits than its factorization.

20144243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 356 counting only the distinct ones).

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

The square root of 20144243 is about 4488.2338397191. The cubic root of 20144243 is about 272.0927586964.

Adding to 20144243 its reverse (34244102), we get a palindrome (54388345).

It can be divided in two parts, 201 and 44243, that added together give a palindrome (44444).

The spelling of 20144243 in words is "twenty million, one hundred forty-four thousand, two hundred forty-three".