20804650 has 48 divisors (see below), whose sum is σ = 41068800. Its totient is φ = 7824960.

The previous prime is 20804611. The next prime is 20804653. The reversal of 20804650 is 5640802.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20804653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90736 + ... + 90964.

It is an arithmetic number, because the mean of its divisors is an integer number (855600).

Almost surely, 2^20804650 is an apocalyptic number.

20804650 is a deficient number, since it is larger than the sum of its proper divisors (20264150).

20804650 is a wasteful number, since it uses less digits than its factorization.

20804650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20804650 is about 4561.2114618816. The cubic root of 20804650 is about 275.0342657027.

It can be divided in two parts, 20804 and 650, that multiplied together give a triangular number (13522600 = T₅₂₀₀).

The spelling of 20804650 in words is "twenty million, eight hundred four thousand, six hundred fifty".