21031876963 has 2 divisors, whose sum is σ = 21031876964. Its totient is φ = 21031876962.

The previous prime is 21031876909. The next prime is 21031877023. The reversal of 21031876963 is 36967813012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21031876963 is a prime.

It is not a weakly prime, because it can be changed into another prime (21031873963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515938481 + 10515938482.

It is an arithmetic number, because the mean of its divisors is an integer number (10515938482).

Almost surely, 2^21031876963 is an apocalyptic number.

21031876963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031876963 is an equidigital number, since it uses as much as digits as its factorization.

21031876963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 21031876963 in words is "twenty-one billion, thirty-one million, eight hundred seventy-six thousand, nine hundred sixty-three".