20669683 has 2 divisors, whose sum is σ = 20669684. Its totient is φ = 20669682.

The previous prime is 20669681. The next prime is 20669729. The reversal of 20669683 is 38696602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20669683 - 2¹ = 20669681 is a prime.

Together with 20669681, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20669681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10334841 + 10334842.

It is an arithmetic number, because the mean of its divisors is an integer number (10334842).

Almost surely, 2^20669683 is an apocalyptic number.

20669683 is a deficient number, since it is larger than the sum of its proper divisors (1).

20669683 is an equidigital number, since it uses as much as digits as its factorization.

20669683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 20669683 is about 4546.3923059938. The cubic root of 20669683 is about 274.4382272913.

The spelling of 20669683 in words is "twenty million, six hundred sixty-nine thousand, six hundred eighty-three".