20220165 has 32 divisors (see below), whose sum is σ = 41084160. Its totient is φ = 9243072.

The previous prime is 20220149. The next prime is 20220173. The reversal of 20220165 is 56102202.

It is not a de Polignac number, because 20220165 - 2⁴ = 20220149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9754 + ... + 11643.

It is an arithmetic number, because the mean of its divisors is an integer number (1283880).

Almost surely, 2^20220165 is an apocalyptic number.

It is an amenable number.

20220165 is an abundant number, since it is smaller than the sum of its proper divisors (20863995).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20220165 is a wasteful number, since it uses less digits than its factorization.

20220165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21418 (or 21412 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20220165 is about 4496.6837780747. The cubic root of 20220165 is about 272.4341619132.

Adding to 20220165 its reverse (56102202), we get a palindrome (76322367).

The spelling of 20220165 in words is "twenty million, two hundred twenty thousand, one hundred sixty-five".