20068457 has 2 divisors, whose sum is σ = 20068458. Its totient is φ = 20068456.

The previous prime is 20068453. The next prime is 20068463. The reversal of 20068457 is 75486002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19855936 + 212521 = 4456^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 20068457 - 2² = 20068453 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20068453) 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, 10034228 + 10034229.

It is an arithmetic number, because the mean of its divisors is an integer number (10034229).

Almost surely, 2^20068457 is an apocalyptic number.

It is an amenable number.

20068457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20068457 is an equidigital number, since it uses as much as digits as its factorization.

20068457 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 20068457 is about 4479.7831420728. The cubic root of 20068457 is about 271.7511104540.

The spelling of 20068457 in words is "twenty million, sixty-eight thousand, four hundred fifty-seven".