21325304000 has 448 divisors, whose sum is σ = 70935201792. Its totient is φ = 6133248000.

The previous prime is 21325303991. The next prime is 21325304051. The reversal of 21325304000 is 40352312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8006669 + ... + 8009331.

It is an arithmetic number, because the mean of its divisors is an integer number (158337504).

Almost surely, 2^21325304000 is an apocalyptic number.

21325304000 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 21325304000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35467600896).

21325304000 is an abundant number, since it is smaller than the sum of its proper divisors (49609897792).

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

21325304000 is a wasteful number, since it uses less digits than its factorization.

21325304000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721 (or 2701 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 21325304000 its reverse (40352312), we get a palindrome (21365656312).

The spelling of 21325304000 in words is "twenty-one billion, three hundred twenty-five million, three hundred four thousand".