19953883867 has 2 divisors, whose sum is σ = 19953883868. Its totient is φ = 19953883866.

The previous prime is 19953883861. The next prime is 19953883877. The reversal of 19953883867 is 76838835991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19953883867 is a prime.

It is not a weakly prime, because it can be changed into another prime (19953883861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9976941933 + 9976941934.

It is an arithmetic number, because the mean of its divisors is an integer number (9976941934).

Almost surely, 2^19953883867 is an apocalyptic number.

19953883867 is a deficient number, since it is larger than the sum of its proper divisors (1).

19953883867 is an equidigital number, since it uses as much as digits as its factorization.

19953883867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78382080, while the sum is 67.

The spelling of 19953883867 in words is "nineteen billion, nine hundred fifty-three million, eight hundred eighty-three thousand, eight hundred sixty-seven".