21204302412 has 24 divisors (see below), whose sum is σ = 49664837376. Its totient is φ = 7041224848.

The previous prime is 21204302401. The next prime is 21204302473. The reversal of 21204302412 is 21420340212.

It is a super-3 number, since 3×21204302412³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3356208 + ... + 3362519.

It is an arithmetic number, because the mean of its divisors is an integer number (2069368224).

Almost surely, 2^21204302412 is an apocalyptic number.

It is an amenable number.

21204302412 is an abundant number, since it is smaller than the sum of its proper divisors (28460534964).

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

21204302412 is a wasteful number, since it uses less digits than its factorization.

21204302412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718997 (or 6718995 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21204302412 its reverse (21420340212), we get a palindrome (42624642624).

The spelling of 21204302412 in words is "twenty-one billion, two hundred four million, three hundred two thousand, four hundred twelve".