20660159 has 8 divisors (see below), whose sum is σ = 22532160. Its totient is φ = 18828576.

The previous prime is 20660153. The next prime is 20660161. The reversal of 20660159 is 95106602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20660159 - 2²⁰ = 19611583 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 (20660153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9032 + ... + 11085.

It is an arithmetic number, because the mean of its divisors is an integer number (2816520).

Almost surely, 2^20660159 is an apocalyptic number.

20660159 is a deficient number, since it is larger than the sum of its proper divisors (1872001).

20660159 is a wasteful number, since it uses less digits than its factorization.

20660159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20209.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 20660159 is about 4545.3447614015. The cubic root of 20660159 is about 274.3960697148.

The spelling of 20660159 in words is "twenty million, six hundred sixty thousand, one hundred fifty-nine".