21233234205 has 24 divisors (see below), whose sum is σ = 37024670592. Its totient is φ = 11256576864.

The previous prime is 21233234203. The next prime is 21233234213. The reversal of 21233234205 is 50243233212.

21233234205 is a `hidden beast` number, since 2 + 1 + 233 + 2 + 3 + 420 + 5 = 666.

It is not a de Polignac number, because 21233234205 - 2¹ = 21233234203 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233234203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1405209 + ... + 1420238.

It is an arithmetic number, because the mean of its divisors is an integer number (1542694608).

Almost surely, 2^21233234205 is an apocalyptic number.

It is an amenable number.

21233234205 is a deficient number, since it is larger than the sum of its proper divisors (15791436387).

21233234205 is a wasteful number, since it uses less digits than its factorization.

21233234205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825625 (or 2825622 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21233234205 its reverse (50243233212), we get a palindrome (71476467417).

The spelling of 21233234205 in words is "twenty-one billion, two hundred thirty-three million, two hundred thirty-four thousand, two hundred five".