20177666650 has 48 divisors (see below), whose sum is σ = 38237508000. Its totient is φ = 7919524160.

The previous prime is 20177666647. The next prime is 20177666687. The reversal of 20177666650 is 5666677102.

It is a self number, because there is not a number n which added to its sum of digits gives 20177666650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1654776 + ... + 1666924.

It is an arithmetic number, because the mean of its divisors is an integer number (796614750).

Almost surely, 2^20177666650 is an apocalyptic number.

20177666650 is a deficient number, since it is larger than the sum of its proper divisors (18059841350).

20177666650 is a wasteful number, since it uses less digits than its factorization.

20177666650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12783 (or 12778 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 46.

It can be divided in two parts, 2017 and 7666650, that added together give a palindrome (7668667).

The spelling of 20177666650 in words is "twenty billion, one hundred seventy-seven million, six hundred sixty-six thousand, six hundred fifty".