20485159 has 2 divisors, whose sum is σ = 20485160. Its totient is φ = 20485158.

The previous prime is 20485121. The next prime is 20485163. The reversal of 20485159 is 95158402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20485159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20485109) 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, 10242579 + 10242580.

It is an arithmetic number, because the mean of its divisors is an integer number (10242580).

Almost surely, 2^20485159 is an apocalyptic number.

20485159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20485159 is an equidigital number, since it uses as much as digits as its factorization.

20485159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 20485159 is about 4526.0533580593. The cubic root of 20485159 is about 273.6191228882.

The spelling of 20485159 in words is "twenty million, four hundred eighty-five thousand, one hundred fifty-nine".