20203144243 has 4 divisors (see below), whose sum is σ = 20204526040. Its totient is φ = 20201762448.

The previous prime is 20203144229. The next prime is 20203144249. The reversal of 20203144243 is 34244130202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20203144243 - 2²¹ = 20201047091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203144249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668730 + ... + 698287.

It is an arithmetic number, because the mean of its divisors is an integer number (5051131510).

Almost surely, 2^20203144243 is an apocalyptic number.

20203144243 is a deficient number, since it is larger than the sum of its proper divisors (1381797).

20203144243 is a wasteful number, since it uses less digits than its factorization.

20203144243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381796.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20203144243 its reverse (34244130202), we get a palindrome (54447274445).

The spelling of 20203144243 in words is "twenty billion, two hundred three million, one hundred forty-four thousand, two hundred forty-three".