21320012233206 has 24 divisors (see below), whose sum is σ = 46196262234720. Its totient is φ = 7106224221936.

The previous prime is 21320012233181. The next prime is 21320012233207. The reversal of 21320012233206 is 60233221002312.

21320012233206 is a `hidden beast` number, since 2 + 1 + 3 + 200 + 122 + 332 + 0 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21320012233206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320012233207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36915705 + ... + 37488788.

It is an arithmetic number, because the mean of its divisors is an integer number (1924844259780).

Almost surely, 2^{21320012233206} is an apocalyptic number.

21320012233206 is an abundant number, since it is smaller than the sum of its proper divisors (24876250001514).

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

21320012233206 is a wasteful number, since it uses less digits than its factorization.

21320012233206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74420420 (or 74420417 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21320012233206 its reverse (60233221002312), we get a palindrome (81553233235518).

The spelling of 21320012233206 in words is "twenty-one trillion, three hundred twenty billion, twelve million, two hundred thirty-three thousand, two hundred six".