20600449 has 2 divisors, whose sum is σ = 20600450. Its totient is φ = 20600448.

The previous prime is 20600431. The next prime is 20600471. The reversal of 20600449 is 94400602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 753424 = 4455^2 + 868^2 .

It is a cyclic number.

It is not a de Polignac number, because 20600449 - 2¹¹ = 20598401 is a prime.

It is not a weakly prime, because it can be changed into another prime (20600149) 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, 10300224 + 10300225.

It is an arithmetic number, because the mean of its divisors is an integer number (10300225).

Almost surely, 2^20600449 is an apocalyptic number.

It is an amenable number.

20600449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20600449 is an equidigital number, since it uses as much as digits as its factorization.

20600449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20600449 is about 4538.7717501544. The cubic root of 20600449 is about 274.1314702875.

The spelling of 20600449 in words is "twenty million, six hundred thousand, four hundred forty-nine".