20165165 has 8 divisors (see below), whose sum is σ = 24285408. Its totient is φ = 16074000.

The previous prime is 20165161. The next prime is 20165183. The reversal of 20165165 is 56156102.

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

It is not a de Polignac number, because 20165165 - 2² = 20165161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5711 + ... + 8540.

It is an arithmetic number, because the mean of its divisors is an integer number (3035676).

Almost surely, 2^20165165 is an apocalyptic number.

It is an amenable number.

20165165 is a deficient number, since it is larger than the sum of its proper divisors (4120243).

20165165 is a wasteful number, since it uses less digits than its factorization.

20165165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14539.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 20165165 is about 4490.5639957582. The cubic root of 20165165 is about 272.1869254681.

The spelling of 20165165 in words is "twenty million, one hundred sixty-five thousand, one hundred sixty-five".