210421404324 has 18 divisors (see below), whose sum is σ = 531898549910. Its totient is φ = 70140468096.

The previous prime is 210421404311. The next prime is 210421404329. The reversal of 210421404324 is 423404124012.

210421404324 is a `hidden beast` number, since 2 + 10 + 4 + 214 + 0 + 432 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 174530101824 + 35891302500 = 417768^2 + 189450^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (210421404329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2922519469 + ... + 2922519540.

Almost surely, 2^210421404324 is an apocalyptic number.

It is an amenable number.

210421404324 is an abundant number, since it is smaller than the sum of its proper divisors (321477145586).

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

210421404324 is a wasteful number, since it uses less digits than its factorization.

210421404324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5845039019 (or 5845039014 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 210421404324 its reverse (423404124012), we get a palindrome (633825528336).

The spelling of 210421404324 in words is "two hundred ten billion, four hundred twenty-one million, four hundred four thousand, three hundred twenty-four".