21320300204 has 12 divisors (see below), whose sum is σ = 42640600464. Its totient is φ = 9137271504.

The previous prime is 21320300123. The next prime is 21320300227. The reversal of 21320300204 is 40200302312.

21320300204 is an admirable 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, 380719619 + ... + 380719674.

It is an arithmetic number, because the mean of its divisors is an integer number (3553383372).

Almost surely, 2^21320300204 is an apocalyptic number.

It is an amenable number.

21320300204 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.

21320300204 is a wasteful number, since it uses less digits than its factorization.

21320300204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761439304 (or 761439302 counting only the distinct ones).

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

Adding to 21320300204 its reverse (40200302312), we get a palindrome (61520602516).

The spelling of 21320300204 in words is "twenty-one billion, three hundred twenty million, three hundred thousand, two hundred four".