12840194431 has 4 divisors (see below), whose sum is σ = 13031839192. Its totient is φ = 12648549672.

The previous prime is 12840194413. The next prime is 12840194449. The reversal of 12840194431 is 13449104821.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12840194413) and next prime (12840194449).

It is a cyclic number.

It is not a de Polignac number, because 12840194431 - 2¹¹ = 12840192383 is a prime.

It is a super-2 number, since 2×12840194431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840194491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95822280 + ... + 95822413.

It is an arithmetic number, because the mean of its divisors is an integer number (3257959798).

Almost surely, 2^12840194431 is an apocalyptic number.

12840194431 is a deficient number, since it is larger than the sum of its proper divisors (191644761).

12840194431 is an equidigital number, since it uses as much as digits as its factorization.

12840194431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191644760.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 12840194431 in words is "twelve billion, eight hundred forty million, one hundred ninety-four thousand, four hundred thirty-one".