20680883 has 4 divisors (see below), whose sum is σ = 20694168. Its totient is φ = 20667600.

The previous prime is 20680867. The next prime is 20680901. The reversal of 20680883 is 38808602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20680883 - 2⁴ = 20680867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20680843) by changing a digit.

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, 3941 + ... + 7542.

It is an arithmetic number, because the mean of its divisors is an integer number (5173542).

Almost surely, 2^20680883 is an apocalyptic number.

20680883 is a deficient number, since it is larger than the sum of its proper divisors (13285).

20680883 is a wasteful number, since it uses less digits than its factorization.

20680883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13284.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 20680883 is about 4547.6238850635. The cubic root of 20680883 is about 274.4877870442.

The spelling of 20680883 in words is "twenty million, six hundred eighty thousand, eight hundred eighty-three".