20586497 has 2 divisors, whose sum is σ = 20586498. Its totient is φ = 20586496.

The previous prime is 20586493. The next prime is 20586509. The reversal of 20586497 is 79468502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18671041 + 1915456 = 4321^2 + 1384^2 .

It is a cyclic number.

It is not a de Polignac number, because 20586497 - 2² = 20586493 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20586493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10293248 + 10293249.

It is an arithmetic number, because the mean of its divisors is an integer number (10293249).

It is a Proth number, since it is equal to 2513 ⋅ 2¹³ + 1 and 2513 < 2¹³.

Almost surely, 2^20586497 is an apocalyptic number.

It is an amenable number.

20586497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20586497 is an equidigital number, since it uses as much as digits as its factorization.

20586497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 20586497 is about 4537.2345101394. The cubic root of 20586497 is about 274.0695695972.

The spelling of 20586497 in words is "twenty million, five hundred eighty-six thousand, four hundred ninety-seven".