20139675343171 has 2 divisors, whose sum is σ = 20139675343172. Its totient is φ = 20139675343170.

The previous prime is 20139675343169. The next prime is 20139675343201. The reversal of 20139675343171 is 17134357693102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20139675343171 - 2¹ = 20139675343169 is a prime.

Together with 20139675343169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20139675341171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10069837671585 + 10069837671586.

It is an arithmetic number, because the mean of its divisors is an integer number (10069837671586).

Almost surely, 2^{20139675343171} is an apocalyptic number.

20139675343171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20139675343171 is an equidigital number, since it uses as much as digits as its factorization.

20139675343171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 52.

The spelling of 20139675343171 in words is "twenty trillion, one hundred thirty-nine billion, six hundred seventy-five million, three hundred forty-three thousand, one hundred seventy-one".