1340143220423 has 16 divisors (see below), whose sum is σ = 1584619364160. Its totient is φ = 1108934534400.

The previous prime is 1340143220419. The next prime is 1340143220447. The reversal of 1340143220423 is 3240223410431.

It is not a de Polignac number, because 1340143220423 - 2² = 1340143220419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340143220413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077413 + ... + 1959873.

It is an arithmetic number, because the mean of its divisors is an integer number (99038710260).

Almost surely, 2^{1340143220423} is an apocalyptic number.

1340143220423 is a deficient number, since it is larger than the sum of its proper divisors (244476143737).

1340143220423 is an equidigital number, since it uses as much as digits as its factorization.

1340143220423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889978.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 1340143220423 its reverse (3240223410431), we get a palindrome (4580366630854).

The spelling of 1340143220423 in words is "one trillion, three hundred forty billion, one hundred forty-three million, two hundred twenty thousand, four hundred twenty-three".