21252591360000 has 5760 divisors, whose sum is σ = 109522571558400. Its totient is φ = 3822059520000.

The previous prime is 21252591359977. The next prime is 21252591360043. The reversal of 21252591360000 is 6319525212.

It is a happy number.

21252591360000 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 2 + 591 + 3 + 60 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (5760).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 219098879952 + ... + 219098880048.

It is an arithmetic number, because the mean of its divisors is an integer number (19014335340).

Almost surely, 2^{21252591360000} is an apocalyptic number.

21252591360000 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 21252591360000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54761285779200).

21252591360000 is an abundant number, since it is smaller than the sum of its proper divisors (88269980198400).

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

21252591360000 is a wasteful number, since it uses less digits than its factorization.

21252591360000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 21252591360000 in words is "twenty-one trillion, two hundred fifty-two billion, five hundred ninety-one million, three hundred sixty thousand".