21022303204 has 36 divisors (see below), whose sum is σ = 42932254764. Its totient is φ = 8980747776.

The previous prime is 21022303199. The next prime is 21022303217. The reversal of 21022303204 is 40230322012.

It can be written as a sum of positive squares in 2 ways, for example, as 4677192100 + 16345111104 = 68390^2 + 127848^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 109989 + ... + 232684.

Almost surely, 2^21022303204 is an apocalyptic number.

It is an amenable number.

21022303204 is an abundant number, since it is smaller than the sum of its proper divisors (21909951560).

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

21022303204 is a wasteful number, since it uses less digits than its factorization.

21022303204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343004 (or 342995 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21022303204 its reverse (40230322012), we get a palindrome (61252625216).

The spelling of 21022303204 in words is "twenty-one billion, twenty-two million, three hundred three thousand, two hundred four".