21404324004304 has 20 divisors (see below), whose sum is σ = 41471563896064. Its totient is φ = 10701984934368.

The previous prime is 21404324004289. The next prime is 21404324004347. The reversal of 21404324004304 is 40340042340412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10066722 + ... + 12006145.

Almost surely, 2^{21404324004304} is an apocalyptic number.

It is an amenable number.

21404324004304 is a deficient number, since it is larger than the sum of its proper divisors (20067239891760).

21404324004304 is a wasteful number, since it uses less digits than its factorization.

21404324004304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22133482 (or 22133476 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 21404324004304 its reverse (40340042340412), we get a palindrome (61744366344716).

The spelling of 21404324004304 in words is "twenty-one trillion, four hundred four billion, three hundred twenty-four million, four thousand, three hundred four".