20385018671 has 2 divisors, whose sum is σ = 20385018672. Its totient is φ = 20385018670.

The previous prime is 20385018649. The next prime is 20385018697. The reversal of 20385018671 is 17681058302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20385018671 - 2¹⁸ = 20384756527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20385011671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10192509335 + 10192509336.

It is an arithmetic number, because the mean of its divisors is an integer number (10192509336).

Almost surely, 2^20385018671 is an apocalyptic number.

20385018671 is a deficient number, since it is larger than the sum of its proper divisors (1).

20385018671 is an equidigital number, since it uses as much as digits as its factorization.

20385018671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 20385018671 in words is "twenty billion, three hundred eighty-five million, eighteen thousand, six hundred seventy-one".