20120159 has 4 divisors (see below), whose sum is σ = 20273880. Its totient is φ = 19966440.

The previous prime is 20120153. The next prime is 20120161. The reversal of 20120159 is 95102102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20120159 - 2⁴ = 20120143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20120159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76664 + ... + 76925.

It is an arithmetic number, because the mean of its divisors is an integer number (5068470).

Almost surely, 2^20120159 is an apocalyptic number.

20120159 is a deficient number, since it is larger than the sum of its proper divisors (153721).

20120159 is a wasteful number, since it uses less digits than its factorization.

20120159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153720.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 20120159 is about 4485.5500220151. The cubic root of 20120159 is about 271.9842794764.

The spelling of 20120159 in words is "twenty million, one hundred twenty thousand, one hundred fifty-nine".