21333223233 has 32 divisors (see below), whose sum is σ = 36140267520. Its totient is φ = 12183486480.

The previous prime is 21333223229. The next prime is 21333223267. The reversal of 21333223233 is 33232233312.

21333223233 is a `hidden beast` number, since 2 + 1 + 3 + 332 + 2 + 323 + 3 = 666.

It is not a de Polignac number, because 21333223233 - 2² = 21333223229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21333223197 and 21333223206.

It is not an unprimeable number, because it can be changed into a prime (21333223213) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 311116 + ... + 373442.

It is an arithmetic number, because the mean of its divisors is an integer number (1129383360).

Almost surely, 2^21333223233 is an apocalyptic number.

It is an amenable number.

21333223233 is a deficient number, since it is larger than the sum of its proper divisors (14807044287).

21333223233 is a wasteful number, since it uses less digits than its factorization.

21333223233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64154 (or 64148 counting only the distinct ones).

The product of its digits is 11664, while the sum is 27.

Adding to 21333223233 its reverse (33232233312), we get a palindrome (54565456545).

The spelling of 21333223233 in words is "twenty-one billion, three hundred thirty-three million, two hundred twenty-three thousand, two hundred thirty-three".