20568497 has 2 divisors, whose sum is σ = 20568498. Its totient is φ = 20568496.

The previous prime is 20568461. The next prime is 20568533. The reversal of 20568497 is 79486502.

It is a balanced prime because it is at equal distance from previous prime (20568461) and next prime (20568533).

It can be written as a sum of positive squares in only one way, i.e., 13256881 + 7311616 = 3641^2 + 2704^2 .

It is a cyclic number.

It is not a de Polignac number, because 20568497 - 2¹⁶ = 20502961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20168497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10284248 + 10284249.

It is an arithmetic number, because the mean of its divisors is an integer number (10284249).

Almost surely, 2^20568497 is an apocalyptic number.

It is an amenable number.

20568497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20568497 is an equidigital number, since it uses as much as digits as its factorization.

20568497 is an evil number, because the sum of its binary digits is even.

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

The square root of 20568497 is about 4535.2504892233. The cubic root of 20568497 is about 273.9896678577.

The spelling of 20568497 in words is "twenty million, five hundred sixty-eight thousand, four hundred ninety-seven".