21233106652 has 12 divisors (see below), whose sum is σ = 37160739280. Its totient is φ = 10615752576.

The previous prime is 21233106647. The next prime is 21233106659. The reversal of 21233106652 is 25660133212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233106659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138408 + ... + 248239.

Almost surely, 2^21233106652 is an apocalyptic number.

It is an amenable number.

21233106652 is a deficient number, since it is larger than the sum of its proper divisors (15927632628).

21233106652 is a wasteful number, since it uses less digits than its factorization.

21233106652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400380 (or 400378 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 21233106652 its reverse (25660133212), we get a palindrome (46893239864).

The spelling of 21233106652 in words is "twenty-one billion, two hundred thirty-three million, one hundred six thousand, six hundred fifty-two".