20016677 has 2 divisors, whose sum is σ = 20016678. Its totient is φ = 20016676.

The previous prime is 20016649. The next prime is 20016679. The reversal of 20016677 is 77661002.

It is a Cunningham number, because it is equal to 4474²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20016676 + 1 = 4474^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 20016677 - 2⁶ = 20016613 is a prime.

Together with 20016679, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20016679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008338 + 10008339.

It is an arithmetic number, because the mean of its divisors is an integer number (10008339).

Almost surely, 2^20016677 is an apocalyptic number.

It is an amenable number.

20016677 is a deficient number, since it is larger than the sum of its proper divisors (1).

20016677 is an equidigital number, since it uses as much as digits as its factorization.

20016677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 20016677 is about 4474.0001117568. Note that the first 3 decimals coincide. The cubic root of 20016677 is about 271.5171879363.

Adding to 20016677 its reverse (77661002), we get a palindrome (97677679).

The spelling of 20016677 in words is "twenty million, sixteen thousand, six hundred seventy-seven".