21411432223 has 4 divisors (see below), whose sum is σ = 21539644560. Its totient is φ = 21283219888.

The previous prime is 21411432179. The next prime is 21411432257. The reversal of 21411432223 is 32223411412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21411432223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411432023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64105918 + ... + 64106251.

It is an arithmetic number, because the mean of its divisors is an integer number (5384911140).

Almost surely, 2^21411432223 is an apocalyptic number.

21411432223 is a deficient number, since it is larger than the sum of its proper divisors (128212337).

21411432223 is a wasteful number, since it uses less digits than its factorization.

21411432223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128212336.

The product of its digits is 2304, while the sum is 25.

Adding to 21411432223 its reverse (32223411412), we get a palindrome (53634843635).

The spelling of 21411432223 in words is "twenty-one billion, four hundred eleven million, four hundred thirty-two thousand, two hundred twenty-three".