20001440143 has 2 divisors, whose sum is σ = 20001440144. Its totient is φ = 20001440142.

The previous prime is 20001440111. The next prime is 20001440171. The reversal of 20001440143 is 34104410002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001440143 - 2⁵ = 20001440111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001440143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001440183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000720071 + 10000720072.

It is an arithmetic number, because the mean of its divisors is an integer number (10000720072).

Almost surely, 2^20001440143 is an apocalyptic number.

20001440143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001440143 is an equidigital number, since it uses as much as digits as its factorization.

20001440143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20001440143 its reverse (34104410002), we get a palindrome (54105850145).

The spelling of 20001440143 in words is "twenty billion, one million, four hundred forty thousand, one hundred forty-three".