20665663383 has 8 divisors (see below), whose sum is σ = 27556142848. Its totient is φ = 13776146424.

The previous prime is 20665663373. The next prime is 20665663397. The reversal of 20665663383 is 38336656602.

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

It is not a de Polignac number, because 20665663383 - 2⁸ = 20665663127 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 (20665663363) by changing a digit.

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, 188941 + ... + 277542.

It is an arithmetic number, because the mean of its divisors is an integer number (3444517856).

Almost surely, 2^20665663383 is an apocalyptic number.

20665663383 is a deficient number, since it is larger than the sum of its proper divisors (6890479465).

20665663383 is a wasteful number, since it uses less digits than its factorization.

20665663383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481253.

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 20665663383 in words is "twenty billion, six hundred sixty-five million, six hundred sixty-three thousand, three hundred eighty-three".