21333133232 has 40 divisors (see below), whose sum is σ = 41524306560. Its totient is φ = 10617259520.

The previous prime is 21333133231. The next prime is 21333133249. The reversal of 21333133232 is 23233133312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21333133231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8232257 + ... + 8234847.

It is an arithmetic number, because the mean of its divisors is an integer number (1038107664).

Almost surely, 2^21333133232 is an apocalyptic number.

It is an amenable number.

21333133232 is a deficient number, since it is larger than the sum of its proper divisors (20191173328).

21333133232 is a wasteful number, since it uses less digits than its factorization.

21333133232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781 (or 4775 counting only the distinct ones).

The product of its digits is 5832, while the sum is 26.

Adding to 21333133232 its reverse (23233133312), we get a palindrome (44566266544).

The spelling of 21333133232 in words is "twenty-one billion, three hundred thirty-three million, one hundred thirty-three thousand, two hundred thirty-two".