20340111231143 has 16 divisors (see below), whose sum is σ = 22267067961600. Its totient is φ = 18426242042880.

The previous prime is 20340111231133. The next prime is 20340111231161. The reversal of 20340111231143 is 34113211104302.

It is a cyclic number.

It is not a de Polignac number, because 20340111231143 - 2⁴ = 20340111231127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340111231133) 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, 857063 + ... + 6435431.

It is an arithmetic number, because the mean of its divisors is an integer number (1391691747600).

Almost surely, 2^{20340111231143} is an apocalyptic number.

20340111231143 is a deficient number, since it is larger than the sum of its proper divisors (1926956730457).

20340111231143 is a wasteful number, since it uses less digits than its factorization.

20340111231143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579542.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 20340111231143 its reverse (34113211104302), we get a palindrome (54453322335445).

The spelling of 20340111231143 in words is "twenty trillion, three hundred forty billion, one hundred eleven million, two hundred thirty-one thousand, one hundred forty-three".