20884827968999 has 4 divisors (see below), whose sum is σ = 20886340608864. Its totient is φ = 20883315329136.

The previous prime is 20884827968959. The next prime is 20884827969011. The reversal of 20884827968999 is 99986972848802.

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-20884827968999 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 (20884827968929) 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 3 ways as a sum of consecutive naturals, for example, 756299222 + ... + 756326835.

It is an arithmetic number, because the mean of its divisors is an integer number (5221585152216).

Almost surely, 2^{20884827968999} is an apocalyptic number.

20884827968999 is a deficient number, since it is larger than the sum of its proper divisors (1512639865).

20884827968999 is a wasteful number, since it uses less digits than its factorization.

20884827968999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512639864.

The product of its (nonzero) digits is 18059231232, while the sum is 89.

The spelling of 20884827968999 in words is "twenty trillion, eight hundred eighty-four billion, eight hundred twenty-seven million, nine hundred sixty-eight thousand, nine hundred ninety-nine".