20111440231142 has 24 divisors (see below), whose sum is σ = 32752405799640. Its totient is φ = 9257711823360.

The previous prime is 20111440231061. The next prime is 20111440231163. The reversal of 20111440231142 is 24113204411102.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78369659 + ... + 78625862.

It is an arithmetic number, because the mean of its divisors is an integer number (1364683574985).

Almost surely, 2^{20111440231142} is an apocalyptic number.

20111440231142 is a deficient number, since it is larger than the sum of its proper divisors (12640965568498).

20111440231142 is a wasteful number, since it uses less digits than its factorization.

20111440231142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156995928 (or 156995915 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 20111440231142 its reverse (24113204411102), we get a palindrome (44224644642244).

The spelling of 20111440231142 in words is "twenty trillion, one hundred eleven billion, four hundred forty million, two hundred thirty-one thousand, one hundred forty-two".