20664676 has 24 divisors (see below), whose sum is σ = 37185120. Its totient is φ = 10044672.

The previous prime is 20664667. The next prime is 20664689. The reversal of 20664676 is 67646602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21780 + ... + 22708.

It is an arithmetic number, because the mean of its divisors is an integer number (1549380).

Almost surely, 2^20664676 is an apocalyptic number.

It is an amenable number.

20664676 is a deficient number, since it is larger than the sum of its proper divisors (16520444).

20664676 is a wasteful number, since it uses less digits than its factorization.

20664676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 20664676 is about 4545.8416162467. The cubic root of 20664676 is about 274.4160656359.

The spelling of 20664676 in words is "twenty million, six hundred sixty-four thousand, six hundred seventy-six".