20104164 has 36 divisors (see below), whose sum is σ = 51156924. Its totient is φ = 6656832.

The previous prime is 20104159. The next prime is 20104171. The reversal of 20104164 is 46140102.

It can be written as a sum of positive squares in 2 ways, for example, as 4040100 + 16064064 = 2010^2 + 4008^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3874 + ... + 7430.

Almost surely, 2^20104164 is an apocalyptic number.

It is an amenable number.

20104164 is an abundant number, since it is smaller than the sum of its proper divisors (31052760).

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

20104164 is a wasteful number, since it uses less digits than its factorization.

20104164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20104164 is about 4483.7667200692. The cubic root of 20104164 is about 271.9121869070.

Adding to 20104164 its reverse (46140102), we get a palindrome (66244266).

The spelling of 20104164 in words is "twenty million, one hundred four thousand, one hundred sixty-four".