21192802304 has 96 divisors (see below), whose sum is σ = 43861395870. Its totient is φ = 10239344640.

The previous prime is 21192802271. The next prime is 21192802363. The reversal of 21192802304 is 40320829112.

It can be written as a sum of positive squares in only one way, i.e., 19287654400 + 1905147904 = 138880^2 + 43648^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31489712 + ... + 31490384.

Almost surely, 2^21192802304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21192802304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21930697935).

21192802304 is an abundant number, since it is smaller than the sum of its proper divisors (22668593566).

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

21192802304 is an frugal number, since it uses more digits than its factorization.

21192802304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 21192802304 in words is "twenty-one billion, one hundred ninety-two million, eight hundred two thousand, three hundred four".