21333123320 has 32 divisors (see below), whose sum is σ = 48011529600. Its totient is φ = 8531115648.

The previous prime is 21333123311. The next prime is 21333123341. The reversal of 21333123320 is 2332133312.

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 7 ways as a sum of consecutive naturals, for example, 100466 + ... + 229694.

It is an arithmetic number, because the mean of its divisors is an integer number (1500360300).

Almost surely, 2^21333123320 is an apocalyptic number.

21333123320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21333123320 is an abundant number, since it is smaller than the sum of its proper divisors (26678406280).

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

21333123320 is a wasteful number, since it uses less digits than its factorization.

21333123320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133367 (or 133363 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21333123320 its reverse (2332133312), we get a palindrome (23665256632).

The spelling of 21333123320 in words is "twenty-one billion, three hundred thirty-three million, one hundred twenty-three thousand, three hundred twenty".