21230304002 has 8 divisors (see below), whose sum is σ = 31865401596. Its totient is φ = 10608503472.

The previous prime is 21230304001. The next prime is 21230304019. The reversal of 21230304002 is 20040303212.

It can be written as a sum of positive squares in 2 ways, for example, as 21228198601 + 2105401 = 145699^2 + 1451^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21230304001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3320273 + ... + 3326660.

Almost surely, 2^21230304002 is an apocalyptic number.

21230304002 is a deficient number, since it is larger than the sum of its proper divisors (10635097594).

21230304002 is a wasteful number, since it uses less digits than its factorization.

21230304002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6648532.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21230304002 its reverse (20040303212), we get a palindrome (41270607214).

The spelling of 21230304002 in words is "twenty-one billion, two hundred thirty million, three hundred four thousand, two".