20550666282579 has 12 divisors (see below), whose sum is σ = 29746267137600. Its totient is φ = 13671842005584.

The previous prime is 20550666282463. The next prime is 20550666282661. The reversal of 20550666282579 is 97528266605502.

It is not a de Polignac number, because 20550666282579 - 2⁹ = 20550666282067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20550666282079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2383510684 + ... + 2383519305.

It is an arithmetic number, because the mean of its divisors is an integer number (2478855594800).

Almost surely, 2^{20550666282579} is an apocalyptic number.

20550666282579 is a deficient number, since it is larger than the sum of its proper divisors (9195600855021).

20550666282579 is a wasteful number, since it uses less digits than its factorization.

20550666282579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4767030474 (or 4767030471 counting only the distinct ones).

The product of its (nonzero) digits is 108864000, while the sum is 63.

The spelling of 20550666282579 in words is "twenty trillion, five hundred fifty billion, six hundred sixty-six million, two hundred eighty-two thousand, five hundred seventy-nine".