20111440231143 has 16 divisors (see below), whose sum is σ = 29823625171200. Its totient is φ = 13394622314520.

The previous prime is 20111440231061. The next prime is 20111440231163. The reversal of 20111440231143 is 34113204411102.

It is a happy number.

20111440231143 is a `hidden beast` number, since 2 + 0 + 1 + 114 + 402 + 3 + 1 + 143 = 666.

It is not a de Polignac number, because 20111440231143 - 2¹⁴ = 20111440214759 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111440231163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361207933 + ... + 361263606.

It is an arithmetic number, because the mean of its divisors is an integer number (1863976573200).

Almost surely, 2^{20111440231143} is an apocalyptic number.

20111440231143 is a deficient number, since it is larger than the sum of its proper divisors (9712184940057).

20111440231143 is a wasteful number, since it uses less digits than its factorization.

20111440231143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722472579 (or 722472573 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 20111440231143 its reverse (34113204411102), we get a palindrome (54224644642245).

The spelling of 20111440231143 in words is "twenty trillion, one hundred eleven billion, four hundred forty million, two hundred thirty-one thousand, one hundred forty-three".