20804612 has 12 divisors (see below), whose sum is σ = 36742860. Its totient is φ = 10306656.

The previous prime is 20804611. The next prime is 20804653. The reversal of 20804612 is 21640802.

It can be written as a sum of positive squares in 2 ways, for example, as 10137856 + 10666756 = 3184^2 + 3266^2 .

It is not an unprimeable number, because it can be changed into a prime (20804611) by changing a digit.

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, 23423 + ... + 24294.

It is an arithmetic number, because the mean of its divisors is an integer number (3061905).

Almost surely, 2^20804612 is an apocalyptic number.

It is an amenable number.

20804612 is a deficient number, since it is larger than the sum of its proper divisors (15938248).

20804612 is a wasteful number, since it uses less digits than its factorization.

20804612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47830 (or 47828 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 20804612 is about 4561.2072963197. The cubic root of 20804612 is about 275.0340982512.

The spelling of 20804612 in words is "twenty million, eight hundred four thousand, six hundred twelve".