21324204384480 has 288 divisors, whose sum is σ = 73598222382048. Its totient is φ = 5621810688000.

The previous prime is 21324204384419. The next prime is 21324204384493. The reversal of 21324204384480 is 8448340242312.

21324204384480 is a `hidden beast` number, since 2 + 1 + 3 + 24 + 204 + 384 + 48 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98354595 + ... + 98571165.

It is an arithmetic number, because the mean of its divisors is an integer number (255549383271).

Almost surely, 2^{21324204384480} is an apocalyptic number.

21324204384480 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 21324204384480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36799111191024).

21324204384480 is an abundant number, since it is smaller than the sum of its proper divisors (52274017997568).

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

21324204384480 is a wasteful number, since it uses less digits than its factorization.

21324204384480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217370 (or 217359 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 45.

The spelling of 21324204384480 in words is "twenty-one trillion, three hundred twenty-four billion, two hundred four million, three hundred eighty-four thousand, four hundred eighty".