21033223324 has 6 divisors (see below), whose sum is σ = 36808140824. Its totient is φ = 10516611660.

The previous prime is 21033223313. The next prime is 21033223397. The reversal of 21033223324 is 42332233012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2629152912 + ... + 2629152919.

Almost surely, 2^21033223324 is an apocalyptic number.

It is an amenable number.

21033223324 is a deficient number, since it is larger than the sum of its proper divisors (15774917500).

21033223324 is a wasteful number, since it uses less digits than its factorization.

21033223324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5258305835 (or 5258305833 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 21033223324 its reverse (42332233012), we get a palindrome (63365456336).

The spelling of 21033223324 in words is "twenty-one billion, thirty-three million, two hundred twenty-three thousand, three hundred twenty-four".