21230133306 has 16 divisors (see below), whose sum is σ = 42474367200. Its totient is φ = 7074361008.

The previous prime is 21230133299. The next prime is 21230133317. The reversal of 21230133306 is 60333103212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567901 + ... + 604128.

It is an arithmetic number, because the mean of its divisors is an integer number (2654647950).

Almost surely, 2^21230133306 is an apocalyptic number.

21230133306 is an abundant number, since it is smaller than the sum of its proper divisors (21244233894).

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

21230133306 is a wasteful number, since it uses less digits than its factorization.

21230133306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175053.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21230133306 its reverse (60333103212), we get a palindrome (81563236518).

The spelling of 21230133306 in words is "twenty-one billion, two hundred thirty million, one hundred thirty-three thousand, three hundred six".