19879700671 has 2 divisors, whose sum is σ = 19879700672. Its totient is φ = 19879700670.

The previous prime is 19879700663. The next prime is 19879700707. The reversal of 19879700671 is 17600797891.

It is a weak prime.

It is an emirp because it is prime and its reverse (17600797891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19879700671 - 2³ = 19879700663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19879700611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9939850335 + 9939850336.

It is an arithmetic number, because the mean of its divisors is an integer number (9939850336).

Almost surely, 2^19879700671 is an apocalyptic number.

19879700671 is a deficient number, since it is larger than the sum of its proper divisors (1).

19879700671 is an equidigital number, since it uses as much as digits as its factorization.

19879700671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1333584, while the sum is 55.

The spelling of 19879700671 in words is "nineteen billion, eight hundred seventy-nine million, seven hundred thousand, six hundred seventy-one".