19978250063 has 2 divisors, whose sum is σ = 19978250064. Its totient is φ = 19978250062.

The previous prime is 19978250029. The next prime is 19978250069. The reversal of 19978250063 is 36005287991.

It is a strong prime.

It is an emirp because it is prime and its reverse (36005287991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19978250063 - 2¹⁴ = 19978233679 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19978249993 and 19978250020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19978250069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9989125031 + 9989125032.

It is an arithmetic number, because the mean of its divisors is an integer number (9989125032).

Almost surely, 2^19978250063 is an apocalyptic number.

19978250063 is a deficient number, since it is larger than the sum of its proper divisors (1).

19978250063 is an equidigital number, since it uses as much as digits as its factorization.

19978250063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 19978250063 in words is "nineteen billion, nine hundred seventy-eight million, two hundred fifty thousand, sixty-three".