20706668 has 6 divisors (see below), whose sum is σ = 36236676. Its totient is φ = 10353332.

The previous prime is 20706661. The next prime is 20706677. The reversal of 20706668 is 86660702.

It is not an unprimeable number, because it can be changed into a prime (20706661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2588330 + ... + 2588337.

It is an arithmetic number, because the mean of its divisors is an integer number (6039446).

Almost surely, 2^20706668 is an apocalyptic number.

It is an amenable number.

20706668 is a deficient number, since it is larger than the sum of its proper divisors (15530008).

20706668 is a wasteful number, since it uses less digits than its factorization.

20706668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176671 (or 5176669 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20706668 is about 4550.4579989271. The cubic root of 20706668 is about 274.6018171227.

The spelling of 20706668 in words is "twenty million, seven hundred six thousand, six hundred sixty-eight".