12142143640 has 32 divisors (see below), whose sum is σ = 29803444560. Its totient is φ = 4415324800.

The previous prime is 12142143623. The next prime is 12142143641. The reversal of 12142143640 is 4634124121.

12142143640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12142143599 and 12142143608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142143641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13797451 + ... + 13798330.

Almost surely, 2^12142143640 is an apocalyptic number.

12142143640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12142143640 is an abundant number, since it is smaller than the sum of its proper divisors (17661300920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12142143640 is a wasteful number, since it uses less digits than its factorization.

12142143640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27595803 (or 27595799 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 12142143640 its reverse (4634124121), we get a palindrome (16776267761).

The spelling of 12142143640 in words is "twelve billion, one hundred forty-two million, one hundred forty-three thousand, six hundred forty".