21210024304 has 20 divisors (see below), whose sum is σ = 46965054064. Its totient is φ = 9090010368.

The previous prime is 21210024301. The next prime is 21210024371. The reversal of 21210024304 is 40342001212.

It is a super-3 number, since 3×21210024304³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210024301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94687497 + ... + 94687720.

Almost surely, 2^21210024304 is an apocalyptic number.

It is an amenable number.

21210024304 is an abundant number, since it is smaller than the sum of its proper divisors (25755029760).

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

21210024304 is a wasteful number, since it uses less digits than its factorization.

21210024304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189375232 (or 189375226 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21210024304 its reverse (40342001212), we get a palindrome (61552025516).

The spelling of 21210024304 in words is "twenty-one billion, two hundred ten million, twenty-four thousand, three hundred four".