21304314828 has 72 divisors (see below), whose sum is σ = 54303434640. Its totient is φ = 7042106880.

The previous prime is 21304314803. The next prime is 21304314839. The reversal of 21304314828 is 82841340312.

It is a happy number.

21304314828 is a `hidden beast` number, since 2 + 130 + 43 + 1 + 482 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 21304314792 and 21304314801.

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, 5487448 + ... + 5491328.

It is an arithmetic number, because the mean of its divisors is an integer number (754214370).

Almost surely, 2^21304314828 is an apocalyptic number.

It is an amenable number.

21304314828 is an abundant number, since it is smaller than the sum of its proper divisors (32999119812).

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

21304314828 is a wasteful number, since it uses less digits than its factorization.

21304314828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5127 (or 5122 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 21304314828 in words is "twenty-one billion, three hundred four million, three hundred fourteen thousand, eight hundred twenty-eight".