21333653055 has 96 divisors (see below), whose sum is σ = 45729815040. Its totient is φ = 9045354240.

The previous prime is 21333653051. The next prime is 21333653149. The reversal of 21333653055 is 55035633312.

21333653055 is a `hidden beast` number, since 2 + 13 + 336 + 5 + 305 + 5 = 666.

It is not a de Polignac number, because 21333653055 - 2² = 21333653051 is a prime.

It is a super-2 number, since 2×21333653055² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333653051) 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 95 ways as a sum of consecutive naturals, for example, 35022 + ... + 209508.

It is an arithmetic number, because the mean of its divisors is an integer number (476352240).

Almost surely, 2^21333653055 is an apocalyptic number.

21333653055 is an abundant number, since it is smaller than the sum of its proper divisors (24396161985).

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

21333653055 is a wasteful number, since it uses less digits than its factorization.

21333653055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174541 (or 174538 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 36.

The spelling of 21333653055 in words is "twenty-one billion, three hundred thirty-three million, six hundred fifty-three thousand, fifty-five".