21528936063 has 12 divisors (see below), whose sum is σ = 31130202168. Its totient is φ = 14337462480.

The previous prime is 21528936059. The next prime is 21528936097. The reversal of 21528936063 is 36063982512.

21528936063 is a `hidden beast` number, since 2 + 1 + 5 + 289 + 360 + 6 + 3 = 666.

It is not a de Polignac number, because 21528936063 - 2² = 21528936059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21528936053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254468 + ... + 1271513.

It is an arithmetic number, because the mean of its divisors is an integer number (2594183514).

Almost surely, 2^21528936063 is an apocalyptic number.

21528936063 is a deficient number, since it is larger than the sum of its proper divisors (9601266105).

21528936063 is a wasteful number, since it uses less digits than its factorization.

21528936063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526934 (or 2526931 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 21528936063 in words is "twenty-one billion, five hundred twenty-eight million, nine hundred thirty-six thousand, sixty-three".