20604704 has 24 divisors (see below), whose sum is σ = 41334300. Its totient is φ = 10107136.

The previous prime is 20604691. The next prime is 20604713. The reversal of 20604704 is 40740602.

It can be written as a sum of positive squares in 2 ways, for example, as 16810000 + 3794704 = 4100^2 + 1948^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20604704.

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, 4379 + ... + 7770.

Almost surely, 2^20604704 is an apocalyptic number.

It is an amenable number.

20604704 is an abundant number, since it is smaller than the sum of its proper divisors (20729596).

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

20604704 is a wasteful number, since it uses less digits than its factorization.

20604704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12212 (or 12204 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20604704 is about 4539.2404650999. The cubic root of 20604704 is about 274.1503428391.

The spelling of 20604704 in words is "twenty million, six hundred four thousand, seven hundred four".