21333243004 has 12 divisors (see below), whose sum is σ = 37890387304. Its totient is φ = 10507418064.

The previous prime is 21333242977. The next prime is 21333243011. The reversal of 21333243004 is 40034233312.

It is a self number, because there is not a number n which added to its sum of digits gives 21333243004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39800559 + ... + 39801094.

Almost surely, 2^21333243004 is an apocalyptic number.

It is an amenable number.

21333243004 is a deficient number, since it is larger than the sum of its proper divisors (16557144300).

21333243004 is a wasteful number, since it uses less digits than its factorization.

21333243004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79601724 (or 79601722 counting only the distinct ones).

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

Adding to 21333243004 its reverse (40034233312), we get a palindrome (61367476316).

The spelling of 21333243004 in words is "twenty-one billion, three hundred thirty-three million, two hundred forty-three thousand, four".