20111541143 has 4 divisors (see below), whose sum is σ = 20306798928. Its totient is φ = 19916283360.

The previous prime is 20111541139. The next prime is 20111541169. The reversal of 20111541143 is 34114511102.

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 20111541143 - 2² = 20111541139 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 (22111541143) 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, 97628738 + ... + 97628943.

It is an arithmetic number, because the mean of its divisors is an integer number (5076699732).

Almost surely, 2^20111541143 is an apocalyptic number.

20111541143 is a deficient number, since it is larger than the sum of its proper divisors (195257785).

20111541143 is a wasteful number, since it uses less digits than its factorization.

20111541143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195257784.

The product of its (nonzero) digits is 480, while the sum is 23.

The spelling of 20111541143 in words is "twenty billion, one hundred eleven million, five hundred forty-one thousand, one hundred forty-three".