20641344423 has 24 divisors (see below), whose sum is σ = 32051605248. Its totient is φ = 11781621936.

The previous prime is 20641344419. The next prime is 20641344443. The reversal of 20641344423 is 32444314602.

It is not a de Polignac number, because 20641344423 - 2² = 20641344419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641344443) 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, 50290 + ... + 209312.

It is an arithmetic number, because the mean of its divisors is an integer number (1335483552).

Almost surely, 2^20641344423 is an apocalyptic number.

20641344423 is a deficient number, since it is larger than the sum of its proper divisors (11410260825).

20641344423 is a wasteful number, since it uses less digits than its factorization.

20641344423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159923 (or 159916 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

The spelling of 20641344423 in words is "twenty billion, six hundred forty-one million, three hundred forty-four thousand, four hundred twenty-three".