20206349 has 2 divisors, whose sum is σ = 20206350. Its totient is φ = 20206348.

The previous prime is 20206343. The next prime is 20206369. The reversal of 20206349 is 94360202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11854249 + 8352100 = 3443^2 + 2890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20206349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20206343) 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, 10103174 + 10103175.

It is an arithmetic number, because the mean of its divisors is an integer number (10103175).

Almost surely, 2^20206349 is an apocalyptic number.

It is an amenable number.

20206349 is a deficient number, since it is larger than the sum of its proper divisors (1).

20206349 is an equidigital number, since it uses as much as digits as its factorization.

20206349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20206349 is about 4495.1472723371. The cubic root of 20206349 is about 272.3720983250.

The spelling of 20206349 in words is "twenty million, two hundred six thousand, three hundred forty-nine".