20168459 has 2 divisors, whose sum is σ = 20168460. Its totient is φ = 20168458.

The previous prime is 20168429. The next prime is 20168497. The reversal of 20168459 is 95486102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20168459 is a prime.

It is not a weakly prime, because it can be changed into another prime (20168429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10084229 + 10084230.

It is an arithmetic number, because the mean of its divisors is an integer number (10084230).

Almost surely, 2^20168459 is an apocalyptic number.

20168459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20168459 is an equidigital number, since it uses as much as digits as its factorization.

20168459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20168459 is about 4490.9307498558. The cubic root of 20168459 is about 272.2017453306.

The spelling of 20168459 in words is "twenty million, one hundred sixty-eight thousand, four hundred fifty-nine".