20682734666 has 8 divisors (see below), whose sum is σ = 33844474944. Its totient is φ = 9401243020.

The previous prime is 20682734641. The next prime is 20682734669. The reversal of 20682734666 is 66643728602.

20682734666 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20682734669) 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, 470062130 + ... + 470062173.

It is an arithmetic number, because the mean of its divisors is an integer number (4230559368).

Almost surely, 2^20682734666 is an apocalyptic number.

20682734666 is a deficient number, since it is larger than the sum of its proper divisors (13161740278).

20682734666 is a wasteful number, since it uses less digits than its factorization.

20682734666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940124316.

The product of its (nonzero) digits is 3483648, while the sum is 50.

The spelling of 20682734666 in words is "twenty billion, six hundred eighty-two million, seven hundred thirty-four thousand, six hundred sixty-six".