20020159 has 4 divisors (see below), whose sum is σ = 20079904. Its totient is φ = 19960416.

The previous prime is 20020157. The next prime is 20020163. The reversal of 20020159 is 95102002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95102002 = 2 ⋅47551001.

It is a cyclic number.

It is not a de Polignac number, because 20020159 - 2¹ = 20020157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29367 + ... + 30040.

It is an arithmetic number, because the mean of its divisors is an integer number (5019976).

Almost surely, 2^20020159 is an apocalyptic number.

20020159 is a deficient number, since it is larger than the sum of its proper divisors (59745).

20020159 is an equidigital number, since it uses as much as digits as its factorization.

20020159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59744.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20020159 is about 4474.3892320629. The cubic root of 20020159 is about 271.5329309429.

The spelling of 20020159 in words is "twenty million, twenty thousand, one hundred fifty-nine".