20111141 has 4 divisors (see below), whose sum is σ = 20137932. Its totient is φ = 20084352.

The previous prime is 20111137. The next prime is 20111167. The reversal of 20111141 is 14111102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7480225 + 12630916 = 2735^2 + 3554^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111141 - 2² = 20111137 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 (20111171) 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, 12236 + ... + 13781.

It is an arithmetic number, because the mean of its divisors is an integer number (5034483).

Almost surely, 2^20111141 is an apocalyptic number.

It is an amenable number.

20111141 is a deficient number, since it is larger than the sum of its proper divisors (26791).

20111141 is an equidigital number, since it uses as much as digits as its factorization.

20111141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26790.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 20111141 is about 4484.5446814588. The cubic root of 20111141 is about 271.9436383004.

Adding to 20111141 its reverse (14111102), we get a palindrome (34222243).

The spelling of 20111141 in words is "twenty million, one hundred eleven thousand, one hundred forty-one".