20165404 has 12 divisors (see below), whose sum is σ = 40330864. Its totient is φ = 8642304.

The previous prime is 20165401. The next prime is 20165419. The reversal of 20165404 is 40456102.

20165404 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165401) 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 3 ways as a sum of consecutive naturals, for example, 360069 + ... + 360124.

Almost surely, 2^20165404 is an apocalyptic number.

It is an amenable number.

20165404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20165404 is a wasteful number, since it uses less digits than its factorization.

20165404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720204 (or 720202 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20165404 is about 4490.5906070360. The cubic root of 20165404 is about 272.1880007948.

The spelling of 20165404 in words is "twenty million, one hundred sixty-five thousand, four hundred four".