21336055389 has 24 divisors (see below), whose sum is σ = 33645366144. Its totient is φ = 12921360000.

The previous prime is 21336055361. The next prime is 21336055393. The reversal of 21336055389 is 98355063312.

It is a happy number.

21336055389 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 605 + 5 + 38 + 9 = 666.

It is not a de Polignac number, because 21336055389 - 2⁷ = 21336055261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21336055889) 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 23 ways as a sum of consecutive naturals, for example, 55564 + ... + 213914.

It is an arithmetic number, because the mean of its divisors is an integer number (1401890256).

Almost surely, 2^21336055389 is an apocalyptic number.

It is an amenable number.

21336055389 is a deficient number, since it is larger than the sum of its proper divisors (12309310755).

21336055389 is a wasteful number, since it uses less digits than its factorization.

21336055389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159729 (or 159726 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 21336055389 in words is "twenty-one billion, three hundred thirty-six million, fifty-five thousand, three hundred eighty-nine".