21323232205 has 8 divisors (see below), whose sum is σ = 27914049504. Its totient is φ = 15507805200.

The previous prime is 21323232197. The next prime is 21323232233. The reversal of 21323232205 is 50223232312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21323232205 - 2³ = 21323232197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21323232205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193847511 + ... + 193847620.

It is an arithmetic number, because the mean of its divisors is an integer number (3489256188).

Almost surely, 2^21323232205 is an apocalyptic number.

It is an amenable number.

21323232205 is a deficient number, since it is larger than the sum of its proper divisors (6590817299).

21323232205 is a wasteful number, since it uses less digits than its factorization.

21323232205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387695147.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21323232205 its reverse (50223232312), we get a palindrome (71546464517).

The spelling of 21323232205 in words is "twenty-one billion, three hundred twenty-three million, two hundred thirty-two thousand, two hundred five".