20620049 has 2 divisors, whose sum is σ = 20620050. Its totient is φ = 20620048.

The previous prime is 20620037. The next prime is 20620051. The reversal of 20620049 is 94002602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20566225 + 53824 = 4535^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 20620049 - 2¹² = 20615953 is a prime.

Together with 20620051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20620079) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310024 + 10310025.

It is an arithmetic number, because the mean of its divisors is an integer number (10310025).

Almost surely, 2^20620049 is an apocalyptic number.

It is an amenable number.

20620049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620049 is an equidigital number, since it uses as much as digits as its factorization.

20620049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20620049 is about 4540.9304112704. The cubic root of 20620049 is about 274.2183822072.

The spelling of 20620049 in words is "twenty million, six hundred twenty thousand, forty-nine".