21230321332320 has 144 divisors (see below), whose sum is σ = 76261549094640. Its totient is φ = 5363449592832.

The previous prime is 21230321332309. The next prime is 21230321332357. The reversal of 21230321332320 is 2323312303212.

21230321332320 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 0 + 3 + 2 + 1 + 332 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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 23 ways as a sum of consecutive naturals, for example, 387953659 + ... + 388008378.

It is an arithmetic number, because the mean of its divisors is an integer number (529594090935).

Almost surely, 2^{21230321332320} is an apocalyptic number.

21230321332320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230321332320 is an abundant number, since it is smaller than the sum of its proper divisors (55031227762320).

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

21230321332320 is a wasteful number, since it uses less digits than its factorization.

21230321332320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775962077 (or 775962066 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 21230321332320 its reverse (2323312303212), we get a palindrome (23553633635532).

The spelling of 21230321332320 in words is "twenty-one trillion, two hundred thirty billion, three hundred twenty-one million, three hundred thirty-two thousand, three hundred twenty".