21232885563 has 8 divisors (see below), whose sum is σ = 31456126800. Its totient is φ = 14155257024.

The previous prime is 21232885561. The next prime is 21232885571. The reversal of 21232885563 is 36558823212.

21232885563 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 2 + 8 + 85 + 563 = 666.

It is not a de Polignac number, because 21232885563 - 2¹ = 21232885561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21232885561) 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 7 ways as a sum of consecutive naturals, for example, 393201558 + ... + 393201611.

It is an arithmetic number, because the mean of its divisors is an integer number (3932015850).

Almost surely, 2^21232885563 is an apocalyptic number.

21232885563 is a deficient number, since it is larger than the sum of its proper divisors (10223241237).

21232885563 is an equidigital number, since it uses as much as digits as its factorization.

21232885563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786403178 (or 786403172 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 21232885563 in words is "twenty-one billion, two hundred thirty-two million, eight hundred eighty-five thousand, five hundred sixty-three".