21304223324 has 12 divisors (see below), whose sum is σ = 37283430744. Its totient is φ = 10651814544.

The previous prime is 21304223267. The next prime is 21304223351. The reversal of 21304223324 is 42332240312.

It is a junction number, because it is equal to n+sod(n) for n = 21304223293 and 21304223302.

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, 197714 + ... + 285830.

It is an arithmetic number, because the mean of its divisors is an integer number (3106952562).

Almost surely, 2^21304223324 is an apocalyptic number.

It is an amenable number.

21304223324 is a deficient number, since it is larger than the sum of its proper divisors (15979207420).

21304223324 is a wasteful number, since it uses less digits than its factorization.

21304223324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148564 (or 148562 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21304223324 its reverse (42332240312), we get a palindrome (63636463636).

The spelling of 21304223324 in words is "twenty-one billion, three hundred four million, two hundred twenty-three thousand, three hundred twenty-four".