19875289673 has 2 divisors, whose sum is σ = 19875289674. Its totient is φ = 19875289672.

The previous prime is 19875289639. The next prime is 19875289691. The reversal of 19875289673 is 37698257891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19647068224 + 228221449 = 140168^2 + 15107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19875289673 is a prime.

It is not a weakly prime, because it can be changed into another prime (19875282673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9937644836 + 9937644837.

It is an arithmetic number, because the mean of its divisors is an integer number (9937644837).

Almost surely, 2^19875289673 is an apocalyptic number.

It is an amenable number.

19875289673 is a deficient number, since it is larger than the sum of its proper divisors (1).

19875289673 is an equidigital number, since it uses as much as digits as its factorization.

19875289673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45722880, while the sum is 65.

The spelling of 19875289673 in words is "nineteen billion, eight hundred seventy-five million, two hundred eighty-nine thousand, six hundred seventy-three".