21232342205 has 32 divisors (see below), whose sum is σ = 27589161600. Its totient is φ = 15633561600.

The previous prime is 21232342193. The next prime is 21232342207. The reversal of 21232342205 is 50224323212.

It is not a de Polignac number, because 21232342205 - 2²⁴ = 21215564989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232342207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 927386 + ... + 950004.

It is an arithmetic number, because the mean of its divisors is an integer number (862161300).

Almost surely, 2^21232342205 is an apocalyptic number.

It is an amenable number.

21232342205 is a deficient number, since it is larger than the sum of its proper divisors (6356819395).

21232342205 is a wasteful number, since it uses less digits than its factorization.

21232342205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22925.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21232342205 its reverse (50224323212), we get a palindrome (71456665417).

The spelling of 21232342205 in words is "twenty-one billion, two hundred thirty-two million, three hundred forty-two thousand, two hundred five".