20665165174 has 8 divisors (see below), whose sum is σ = 30998359368. Its totient is φ = 10332378720.

The previous prime is 20665165141. The next prime is 20665165193. The reversal of 20665165174 is 47156156602.

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 20665165174.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133869 + ... + 243415.

It is an arithmetic number, because the mean of its divisors is an integer number (3874794921).

Almost surely, 2^20665165174 is an apocalyptic number.

20665165174 is a deficient number, since it is larger than the sum of its proper divisors (10333194194).

20665165174 is a wasteful number, since it uses less digits than its factorization.

20665165174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203870.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 20665165174 in words is "twenty billion, six hundred sixty-five million, one hundred sixty-five thousand, one hundred seventy-four".