19889714953 has 2 divisors, whose sum is σ = 19889714954. Its totient is φ = 19889714952.

The previous prime is 19889714951. The next prime is 19889715019. The reversal of 19889714953 is 35941798891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15545850489 + 4343864464 = 124683^2 + 65908^2 .

It is a cyclic number.

It is not a de Polignac number, because 19889714953 - 2¹ = 19889714951 is a prime.

Together with 19889714951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19889714951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9944857476 + 9944857477.

It is an arithmetic number, because the mean of its divisors is an integer number (9944857477).

Almost surely, 2^19889714953 is an apocalyptic number.

It is an amenable number.

19889714953 is a deficient number, since it is larger than the sum of its proper divisors (1).

19889714953 is an equidigital number, since it uses as much as digits as its factorization.

19889714953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 64.

The spelling of 19889714953 in words is "nineteen billion, eight hundred eighty-nine million, seven hundred fourteen thousand, nine hundred fifty-three".