20000668 has 6 divisors (see below), whose sum is σ = 35001176. Its totient is φ = 10000332.

The previous prime is 20000641. The next prime is 20000671. The reversal of 20000668 is 86600002.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2500080 + ... + 2500087.

Almost surely, 2^20000668 is an apocalyptic number.

It is an amenable number.

20000668 is a deficient number, since it is larger than the sum of its proper divisors (15000508).

20000668 is a wasteful number, since it uses less digits than its factorization.

20000668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000171 (or 5000169 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20000668 is about 4472.2106390464. The cubic root of 20000668 is about 271.4447836775. Note that the first 3 decimals are identical.

The spelling of 20000668 in words is "twenty million, six hundred sixty-eight", and thus it is an aban number.