20620240349 has 2 divisors, whose sum is σ = 20620240350. Its totient is φ = 20620240348.

The previous prime is 20620240307. The next prime is 20620240351. The reversal of 20620240349 is 94304202602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20608612249 + 11628100 = 143557^2 + 3410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20620240349 is a prime.

Together with 20620240351, 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 (20620240369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310120174 + 10310120175.

It is an arithmetic number, because the mean of its divisors is an integer number (10310120175).

Almost surely, 2^20620240349 is an apocalyptic number.

It is an amenable number.

20620240349 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620240349 is an equidigital number, since it uses as much as digits as its factorization.

20620240349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 20620240349 in words is "twenty billion, six hundred twenty million, two hundred forty thousand, three hundred forty-nine".