21009163063 has 4 divisors (see below), whose sum is σ = 24010472080. Its totient is φ = 18007854048.

The previous prime is 21009163027. The next prime is 21009163081. The reversal of 21009163063 is 36036190012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21009163063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21009163003) 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 in 3 ways as a sum of consecutive naturals, for example, 1500654498 + ... + 1500654511.

It is an arithmetic number, because the mean of its divisors is an integer number (6002618020).

Almost surely, 2^21009163063 is an apocalyptic number.

21009163063 is a deficient number, since it is larger than the sum of its proper divisors (3001309017).

21009163063 is an equidigital number, since it uses as much as digits as its factorization.

21009163063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001309016.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 21009163063 in words is "twenty-one billion, nine million, one hundred sixty-three thousand, sixty-three".