20144040243 has 16 divisors (see below), whose sum is σ = 27636456096. Its totient is φ = 13045510400.

The previous prime is 20144040221. The next prime is 20144040271. The reversal of 20144040243 is 34204044102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20144040243 - 2¹⁷ = 20143909171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20144040043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 611130 + ... + 643247.

It is an arithmetic number, because the mean of its divisors is an integer number (1727278506).

Almost surely, 2^20144040243 is an apocalyptic number.

20144040243 is a deficient number, since it is larger than the sum of its proper divisors (7492415853).

20144040243 is a wasteful number, since it uses less digits than its factorization.

20144040243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254534.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20144040243 its reverse (34204044102), we get a palindrome (54348084345).

The spelling of 20144040243 in words is "twenty billion, one hundred forty-four million, forty thousand, two hundred forty-three".