21336306363 has 16 divisors (see below), whose sum is σ = 31821492000. Its totient is φ = 14128737120.

The previous prime is 21336306359. The next prime is 21336306377. The reversal of 21336306363 is 36360363312.

21336306363 is a `hidden beast` number, since 2 + 13 + 3 + 6 + 3 + 0 + 636 + 3 = 666.

It is not a de Polignac number, because 21336306363 - 2² = 21336306359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21336206363) 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 in 15 ways as a sum of consecutive naturals, for example, 2647768 + ... + 2655813.

It is an arithmetic number, because the mean of its divisors is an integer number (1988843250).

Almost surely, 2^21336306363 is an apocalyptic number.

21336306363 is a deficient number, since it is larger than the sum of its proper divisors (10485185637).

21336306363 is a wasteful number, since it uses less digits than its factorization.

21336306363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303739 (or 5303733 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 36.

Adding to 21336306363 its reverse (36360363312), we get a palindrome (57696669675).

The spelling of 21336306363 in words is "twenty-one billion, three hundred thirty-six million, three hundred six thousand, three hundred sixty-three".