20424432143 has 2 divisors, whose sum is σ = 20424432144. Its totient is φ = 20424432142.

The previous prime is 20424432139. The next prime is 20424432151. The reversal of 20424432143 is 34123442402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20424432143 - 2² = 20424432139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424432113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212216071 + 10212216072.

It is an arithmetic number, because the mean of its divisors is an integer number (10212216072).

Almost surely, 2^20424432143 is an apocalyptic number.

20424432143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424432143 is an equidigital number, since it uses as much as digits as its factorization.

20424432143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 20424432143 its reverse (34123442402), we get a palindrome (54547874545).

The spelling of 20424432143 in words is "twenty billion, four hundred twenty-four million, four hundred thirty-two thousand, one hundred forty-three".