21204421302 has 8 divisors (see below), whose sum is σ = 42408842616. Its totient is φ = 7068140432.

The previous prime is 21204421267. The next prime is 21204421331. The reversal of 21204421302 is 20312440212.

It is a sphenic number, since it is the product of 3 distinct primes.

21204421302 is an admirable number.

It is a super-2 number, since 2×21204421302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767035103 + ... + 1767035114.

It is an arithmetic number, because the mean of its divisors is an integer number (5301105327).

Almost surely, 2^21204421302 is an apocalyptic number.

21204421302 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21204421302 is a wasteful number, since it uses less digits than its factorization.

21204421302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534070222.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21204421302 its reverse (20312440212), we get a palindrome (41516861514).

The spelling of 21204421302 in words is "twenty-one billion, two hundred four million, four hundred twenty-one thousand, three hundred two".