21533300512 has 48 divisors (see below), whose sum is σ = 45215233560. Its totient is φ = 10059317248.

The previous prime is 21533300479. The next prime is 21533300513. The reversal of 21533300512 is 21500333512.

It can be written as a sum of positive squares in 4 ways, for example, as 21340535056 + 192765456 = 146084^2 + 13884^2 .

It is not an unprimeable number, because it can be changed into a prime (21533300513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69937 + ... + 218992.

Almost surely, 2^21533300512 is an apocalyptic number.

It is an amenable number.

21533300512 is an abundant number, since it is smaller than the sum of its proper divisors (23681933048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21533300512 is a wasteful number, since it uses less digits than its factorization.

21533300512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289093 (or 289085 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The spelling of 21533300512 in words is "twenty-one billion, five hundred thirty-three million, three hundred thousand, five hundred twelve".