21232289205 has 48 divisors (see below), whose sum is σ = 38019970560. Its totient is φ = 10949904000.

The previous prime is 21232289203. The next prime is 21232289251. The reversal of 21232289205 is 50298223212.

It is not a de Polignac number, because 21232289205 - 2¹ = 21232289203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21232289205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232289203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1988130 + ... + 1998780.

It is an arithmetic number, because the mean of its divisors is an integer number (792082720).

Almost surely, 2^21232289205 is an apocalyptic number.

It is an amenable number.

21232289205 is a deficient number, since it is larger than the sum of its proper divisors (16787681355).

21232289205 is a wasteful number, since it uses less digits than its factorization.

21232289205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122 (or 12119 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 21232289205 in words is "twenty-one billion, two hundred thirty-two million, two hundred eighty-nine thousand, two hundred five".