20111159 has 8 divisors (see below), whose sum is σ = 20606400. Its totient is φ = 19618816.

The previous prime is 20111137. The next prime is 20111167. The reversal of 20111159 is 95111102.

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

It is a cyclic number.

It is not a de Polignac number, because 20111159 - 2²⁰ = 19062583 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 20111159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20627 + ... + 21579.

It is an arithmetic number, because the mean of its divisors is an integer number (2575800).

Almost surely, 2^20111159 is an apocalyptic number.

20111159 is a deficient number, since it is larger than the sum of its proper divisors (495241).

20111159 is an equidigital number, since it uses as much as digits as its factorization.

20111159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 20111159 is about 4484.5466883510. The cubic root of 20111159 is about 271.9437194326.

The spelling of 20111159 in words is "twenty million, one hundred eleven thousand, one hundred fifty-nine".