20086457 has 2 divisors, whose sum is σ = 20086458. Its totient is φ = 20086456.

The previous prime is 20086453. The next prime is 20086471. The reversal of 20086457 is 75468002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13424896 + 6661561 = 3664^2 + 2581^2 .

It is a cyclic number.

It is not a de Polignac number, because 20086457 - 2² = 20086453 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20086453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10043228 + 10043229.

It is an arithmetic number, because the mean of its divisors is an integer number (10043229).

Almost surely, 2^20086457 is an apocalyptic number.

It is an amenable number.

20086457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20086457 is an equidigital number, since it uses as much as digits as its factorization.

20086457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20086457 is about 4481.7917176058. The cubic root of 20086457 is about 271.8323334111.

The spelling of 20086457 in words is "twenty million, eighty-six thousand, four hundred fifty-seven".