20243127139 has 2 divisors, whose sum is σ = 20243127140. Its totient is φ = 20243127138.

The previous prime is 20243127137. The next prime is 20243127161. The reversal of 20243127139 is 93172134202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20243127139 - 2¹ = 20243127137 is a prime.

Together with 20243127137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20243127133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10121563569 + 10121563570.

It is an arithmetic number, because the mean of its divisors is an integer number (10121563570).

Almost surely, 2^20243127139 is an apocalyptic number.

20243127139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20243127139 is an equidigital number, since it uses as much as digits as its factorization.

20243127139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 20243127139 in words is "twenty billion, two hundred forty-three million, one hundred twenty-seven thousand, one hundred thirty-nine".