20609104 has 20 divisors (see below), whose sum is σ = 41666976. Its totient is φ = 9856352.

The previous prime is 20609093. The next prime is 20609123. The reversal of 20609104 is 40190602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27634 + ... + 28369.

Almost surely, 2^20609104 is an apocalyptic number.

It is an amenable number.

20609104 is an abundant number, since it is smaller than the sum of its proper divisors (21057872).

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

20609104 is a wasteful number, since it uses less digits than its factorization.

20609104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56034 (or 56028 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20609104 is about 4539.7251018096. The cubic root of 20609104 is about 274.1698557887.

Adding to 20609104 its reverse (40190602), we get a palindrome (60799706).

The spelling of 20609104 in words is "twenty million, six hundred nine thousand, one hundred four".