20866311496799 has 8 divisors (see below), whose sum is σ = 22097219385600. Its totient is φ = 19635790030336.

The previous prime is 20866311496769. The next prime is 20866311496813. The reversal of 20866311496799 is 99769411366802.

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

It is a cyclic number.

It is not a de Polignac number, because 20866311496799 - 2³⁶ = 20797592020063 is a prime.

It is a super-2 number, since 2×20866311496799² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20866311496759) 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, 96494399 + ... + 96710400.

It is an arithmetic number, because the mean of its divisors is an integer number (2762152423200).

Almost surely, 2^{20866311496799} is an apocalyptic number.

20866311496799 is a deficient number, since it is larger than the sum of its proper divisors (1230907888801).

20866311496799 is a wasteful number, since it uses less digits than its factorization.

20866311496799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193211169.

The product of its (nonzero) digits is 211631616, while the sum is 71.

The spelling of 20866311496799 in words is "twenty trillion, eight hundred sixty-six billion, three hundred eleven million, four hundred ninety-six thousand, seven hundred ninety-nine".