20680268 has 12 divisors (see below), whose sum is σ = 41360592. Its totient is φ = 8862960.

The previous prime is 20680259. The next prime is 20680271. The reversal of 20680268 is 86208602.

It is a happy number.

20680268 is an admirable 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 in 3 ways as a sum of consecutive naturals, for example, 369263 + ... + 369318.

It is an arithmetic number, because the mean of its divisors is an integer number (3446716).

Almost surely, 2^20680268 is an apocalyptic number.

20680268 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20680268 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20680268 is a wasteful number, since it uses less digits than its factorization.

20680268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738592 (or 738590 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 20680268 is about 4547.5562668317. The cubic root of 20680268 is about 274.4850661471.

The spelling of 20680268 in words is "twenty million, six hundred eighty thousand, two hundred sixty-eight".