19641907963 has 2 divisors, whose sum is σ = 19641907964. Its totient is φ = 19641907962.

The previous prime is 19641907927. The next prime is 19641907973. The reversal of 19641907963 is 36970914691.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (36970914691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19641907963 - 2²⁹ = 19105037051 is a prime.

It is not a weakly prime, because it can be changed into another prime (19641907973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9820953981 + 9820953982.

It is an arithmetic number, because the mean of its divisors is an integer number (9820953982).

Almost surely, 2^19641907963 is an apocalyptic number.

19641907963 is a deficient number, since it is larger than the sum of its proper divisors (1).

19641907963 is an equidigital number, since it uses as much as digits as its factorization.

19641907963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 19641907963 in words is "nineteen billion, six hundred forty-one million, nine hundred seven thousand, nine hundred sixty-three".