21463528320 has 768 divisors, whose sum is σ = 83974625280. Its totient is φ = 5016453120.

The previous prime is 21463528319. The next prime is 21463528409. The reversal of 21463528320 is 2382536412.

21463528320 is a `hidden beast` number, since 2 + 14 + 635 + 2 + 8 + 3 + 2 + 0 = 666.

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 (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 169004097 + ... + 169004223.

It is an arithmetic number, because the mean of its divisors is an integer number (109341960).

Almost surely, 2^21463528320 is an apocalyptic number.

21463528320 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 21463528320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41987312640).

21463528320 is an abundant number, since it is smaller than the sum of its proper divisors (62511096960).

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

21463528320 is a wasteful number, since it uses less digits than its factorization.

21463528320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 21463528320 in words is "twenty-one billion, four hundred sixty-three million, five hundred twenty-eight thousand, three hundred twenty".