20966369 has 2 divisors, whose sum is σ = 20966370. Its totient is φ = 20966368.

The previous prime is 20966357. The next prime is 20966411. The reversal of 20966369 is 96366902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19465744 + 1500625 = 4412^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 20966369 - 2¹⁶ = 20900833 is a prime.

It is a super-2 number, since 2×20966369² = 879177258088322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20966969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10483184 + 10483185.

It is an arithmetic number, because the mean of its divisors is an integer number (10483185).

Almost surely, 2^20966369 is an apocalyptic number.

It is an amenable number.

20966369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20966369 is an equidigital number, since it uses as much as digits as its factorization.

20966369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 20966369 is about 4578.9047817136. The cubic root of 20966369 is about 275.7450605678.

The spelling of 20966369 in words is "twenty million, nine hundred sixty-six thousand, three hundred sixty-nine".