20604404 has 12 divisors (see below), whose sum is σ = 36415428. Its totient is φ = 10200000.

The previous prime is 20604359. The next prime is 20604407. The reversal of 20604404 is 40440602.

It can be written as a sum of positive squares in 2 ways, for example, as 18472804 + 2131600 = 4298^2 + 1460^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20604407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25097 + ... + 25904.

It is an arithmetic number, because the mean of its divisors is an integer number (3034619).

Almost surely, 2^20604404 is an apocalyptic number.

It is an amenable number.

20604404 is a deficient number, since it is larger than the sum of its proper divisors (15811024).

20604404 is a wasteful number, since it uses less digits than its factorization.

20604404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51106 (or 51104 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20604404 is about 4539.2074198036. The cubic root of 20604404 is about 274.1490123095.

The spelling of 20604404 in words is "twenty million, six hundred four thousand, four hundred four".