21533104363 has 2 divisors, whose sum is σ = 21533104364. Its totient is φ = 21533104362.

The previous prime is 21533104361. The next prime is 21533104427. The reversal of 21533104363 is 36340133512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21533104363 - 2¹ = 21533104361 is a prime.

Together with 21533104361, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21533104361) 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, 10766552181 + 10766552182.

It is an arithmetic number, because the mean of its divisors is an integer number (10766552182).

Almost surely, 2^21533104363 is an apocalyptic number.

21533104363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21533104363 is an equidigital number, since it uses as much as digits as its factorization.

21533104363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 21533104363 its reverse (36340133512), we get a palindrome (57873237875).

The spelling of 21533104363 in words is "twenty-one billion, five hundred thirty-three million, one hundred four thousand, three hundred sixty-three".