20677277 has 2 divisors, whose sum is σ = 20677278. Its totient is φ = 20677276.

The previous prime is 20677271. The next prime is 20677289. The reversal of 20677277 is 77277602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16760836 + 3916441 = 4094^2 + 1979^2 .

It is a cyclic number.

It is not a de Polignac number, because 20677277 - 2⁶ = 20677213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20677277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20677271) 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 as a sum of consecutive naturals, namely, 10338638 + 10338639.

It is an arithmetic number, because the mean of its divisors is an integer number (10338639).

Almost surely, 2^20677277 is an apocalyptic number.

It is an amenable number.

20677277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20677277 is an equidigital number, since it uses as much as digits as its factorization.

20677277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 38.

The square root of 20677277 is about 4547.2273969970. The cubic root of 20677277 is about 274.4718325272.

The spelling of 20677277 in words is "twenty million, six hundred seventy-seven thousand, two hundred seventy-seven".