21776305963 has 2 divisors, whose sum is σ = 21776305964. Its totient is φ = 21776305962.

The previous prime is 21776305951. The next prime is 21776306059. The reversal of 21776305963 is 36950367712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21776305963 - 2⁹ = 21776305451 is a prime.

It is not a weakly prime, because it can be changed into another prime (21776305913) 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, 10888152981 + 10888152982.

It is an arithmetic number, because the mean of its divisors is an integer number (10888152982).

Almost surely, 2^21776305963 is an apocalyptic number.

21776305963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21776305963 is an equidigital number, since it uses as much as digits as its factorization.

21776305963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1428840, while the sum is 49.

The spelling of 21776305963 in words is "twenty-one billion, seven hundred seventy-six million, three hundred five thousand, nine hundred sixty-three".