20389785466 has 8 divisors (see below), whose sum is σ = 30585732480. Its totient is φ = 10194541308.

The previous prime is 20389785443. The next prime is 20389785469. The reversal of 20389785466 is 66458798302.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20389785466.

It is not an unprimeable number, because it can be changed into a prime (20389785469) 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, 95946 + ... + 223573.

It is an arithmetic number, because the mean of its divisors is an integer number (3823216560).

Almost surely, 2^20389785466 is an apocalyptic number.

20389785466 is a deficient number, since it is larger than the sum of its proper divisors (10195947014).

20389785466 is a wasteful number, since it uses less digits than its factorization.

20389785466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351428.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 20389785466 in words is "twenty billion, three hundred eighty-nine million, seven hundred eighty-five thousand, four hundred sixty-six".