20676961 has 2 divisors, whose sum is σ = 20676962. Its totient is φ = 20676960.

The previous prime is 20676919. The next prime is 20676979. The reversal of 20676961 is 16967602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16851025 + 3825936 = 4105^2 + 1956^2 .

It is a cyclic number.

It is not a de Polignac number, because 20676961 - 2¹⁵ = 20644193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20676961.

It is not a weakly prime, because it can be changed into another prime (20676361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10338480 + 10338481.

It is an arithmetic number, because the mean of its divisors is an integer number (10338481).

Almost surely, 2^20676961 is an apocalyptic number.

It is an amenable number.

20676961 is a deficient number, since it is larger than the sum of its proper divisors (1).

20676961 is an equidigital number, since it uses as much as digits as its factorization.

20676961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 20676961 is about 4547.1926504163. The cubic root of 20676961 is about 274.4704343170.

The spelling of 20676961 in words is "twenty million, six hundred seventy-six thousand, nine hundred sixty-one".