21233013332 has 6 divisors (see below), whose sum is σ = 37157773338. Its totient is φ = 10616506664.

The previous prime is 21233013157. The next prime is 21233013337. The reversal of 21233013332 is 23331033212.

It can be written as a sum of positive squares in only one way, i.e., 16354828996 + 4878184336 = 127886^2 + 69844^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21233013298 and 21233013307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233013337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2654126663 + ... + 2654126670.

It is an arithmetic number, because the mean of its divisors is an integer number (6192962223).

Almost surely, 2^21233013332 is an apocalyptic number.

It is an amenable number.

21233013332 is a deficient number, since it is larger than the sum of its proper divisors (15924760006).

21233013332 is a wasteful number, since it uses less digits than its factorization.

21233013332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5308253337 (or 5308253335 counting only the distinct ones).

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

Adding to 21233013332 its reverse (23331033212), we get a palindrome (44564046544).

The spelling of 21233013332 in words is "twenty-one billion, two hundred thirty-three million, thirteen thousand, three hundred thirty-two".