21383913893760 has 320 divisors, whose sum is σ = 83308166766000. Its totient is φ = 5183978987520.

The previous prime is 21383913893707. The next prime is 21383913893761. The reversal of 21383913893760 is 6739831938312.

21383913893760 is a `hidden beast` number, since 2 + 1 + 3 + 83 + 91 + 389 + 37 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21383913893761) 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 39 ways as a sum of consecutive naturals, for example, 18179685 + ... + 19320164.

Almost surely, 2^{21383913893760} is an apocalyptic number.

21383913893760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21383913893760 is an abundant number, since it is smaller than the sum of its proper divisors (61924252872240).

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

21383913893760 is a wasteful number, since it uses less digits than its factorization.

21383913893760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37499891 (or 37499870 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 21383913893760 in words is "twenty-one trillion, three hundred eighty-three billion, nine hundred thirteen million, eight hundred ninety-three thousand, seven hundred sixty".