19875286681 has 2 divisors, whose sum is σ = 19875286682. Its totient is φ = 19875286680.

The previous prime is 19875286679. The next prime is 19875286759. The reversal of 19875286681 is 18668257891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17078569225 + 2796717456 = 130685^2 + 52884^2 .

It is a cyclic number.

It is not a de Polignac number, because 19875286681 - 2¹ = 19875286679 is a prime.

It is a super-2 number, since 2×19875286681² (a number of 21 digits) contains 22 as substring.

Together with 19875286679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19875286481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9937643340 + 9937643341.

It is an arithmetic number, because the mean of its divisors is an integer number (9937643341).

Almost surely, 2^19875286681 is an apocalyptic number.

It is an amenable number.

19875286681 is a deficient number, since it is larger than the sum of its proper divisors (1).

19875286681 is an equidigital number, since it uses as much as digits as its factorization.

19875286681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 61.

The spelling of 19875286681 in words is "nineteen billion, eight hundred seventy-five million, two hundred eighty-six thousand, six hundred eighty-one".