19145681671 has 2 divisors, whose sum is σ = 19145681672. Its totient is φ = 19145681670.

The previous prime is 19145681641. The next prime is 19145681699. The reversal of 19145681671 is 17618654191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19145681671 - 2¹⁵ = 19145648903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19145681641) 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, 9572840835 + 9572840836.

It is an arithmetic number, because the mean of its divisors is an integer number (9572840836).

Almost surely, 2^19145681671 is an apocalyptic number.

19145681671 is a deficient number, since it is larger than the sum of its proper divisors (1).

19145681671 is an equidigital number, since it uses as much as digits as its factorization.

19145681671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 49.

The spelling of 19145681671 in words is "nineteen billion, one hundred forty-five million, six hundred eighty-one thousand, six hundred seventy-one".