20204164 has 6 divisors (see below), whose sum is σ = 35357294. Its totient is φ = 10102080.

The previous prime is 20204147. The next prime is 20204167. The reversal of 20204164 is 46140202.

It can be written as a sum of positive squares in only one way, i.e., 18130564 + 2073600 = 4258^2 + 1440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2525517 + ... + 2525524.

Almost surely, 2^20204164 is an apocalyptic number.

It is an amenable number.

20204164 is a deficient number, since it is larger than the sum of its proper divisors (15153130).

20204164 is a wasteful number, since it uses less digits than its factorization.

20204164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051045 (or 5051043 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20204164 is about 4494.9042258985. The cubic root of 20204164 is about 272.3622803797.

Adding to 20204164 its reverse (46140202), we get a palindrome (66344366).

The spelling of 20204164 in words is "twenty million, two hundred four thousand, one hundred sixty-four".