20966108083199 has 4 divisors (see below), whose sum is σ = 21162053018664. Its totient is φ = 20770163147736.

The previous prime is 20966108083187. The next prime is 20966108083201. The reversal of 20966108083199 is 99138080166902.

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

It is a cyclic number.

It is not a de Polignac number, because 20966108083199 - 2¹⁶ = 20966108017663 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 (20966108083699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97972467572 + ... + 97972467785.

It is an arithmetic number, because the mean of its divisors is an integer number (5290513254666).

Almost surely, 2^{20966108083199} is an apocalyptic number.

20966108083199 is a deficient number, since it is larger than the sum of its proper divisors (195944935465).

20966108083199 is a wasteful number, since it uses less digits than its factorization.

20966108083199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195944935464.

The product of its (nonzero) digits is 10077696, while the sum is 62.

The spelling of 20966108083199 in words is "twenty trillion, nine hundred sixty-six billion, one hundred eight million, eighty-three thousand, one hundred ninety-nine".