21236534340000 has 1440 divisors, whose sum is σ = 86005647383040. Its totient is φ = 4563465984000.

The previous prime is 21236534339987. The next prime is 21236534340011. The reversal of 21236534340000 is 4343563212.

It is a happy number.

21236534340000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 in 239 ways as a sum of consecutive naturals, for example, 3989577339 + ... + 3989582661.

It is an arithmetic number, because the mean of its divisors is an integer number (59726144016).

Almost surely, 2^{21236534340000} is an apocalyptic number.

21236534340000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21236534340000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43002823691520).

21236534340000 is an abundant number, since it is smaller than the sum of its proper divisors (64769113043040).

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

21236534340000 is a wasteful number, since it uses less digits than its factorization.

21236534340000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5452 (or 5422 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

The spelling of 21236534340000 in words is "twenty-one trillion, two hundred thirty-six billion, five hundred thirty-four million, three hundred forty thousand".