20805676 has 12 divisors (see below), whose sum is σ = 36448272. Its totient is φ = 10391888.

The previous prime is 20805647. The next prime is 20805689. The reversal of 20805676 is 67650802.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2766 + ... + 7018.

It is an arithmetic number, because the mean of its divisors is an integer number (3037356).

Almost surely, 2^20805676 is an apocalyptic number.

It is an amenable number.

20805676 is a deficient number, since it is larger than the sum of its proper divisors (15642596).

20805676 is a wasteful number, since it uses less digits than its factorization.

20805676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5480 (or 5478 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 20805676 is about 4561.3239306149. The cubic root of 20805676 is about 275.0387868156.

The spelling of 20805676 in words is "twenty million, eight hundred five thousand, six hundred seventy-six".