21210030204 has 48 divisors (see below), whose sum is σ = 54351561600. Its totient is φ = 6384139840.

The previous prime is 21210030187. The next prime is 21210030253. The reversal of 21210030204 is 40203001212.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 519534 + ... + 558869.

It is an arithmetic number, because the mean of its divisors is an integer number (1132324200).

Almost surely, 2^21210030204 is an apocalyptic number.

It is an amenable number.

21210030204 is an abundant number, since it is smaller than the sum of its proper divisors (33141531396).

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

21210030204 is a wasteful number, since it uses less digits than its factorization.

21210030204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078570 (or 1078568 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21210030204 its reverse (40203001212), we get a palindrome (61413031416).

The spelling of 21210030204 in words is "twenty-one billion, two hundred ten million, thirty thousand, two hundred four".