12840823426 has 8 divisors (see below), whose sum is σ = 19264170240. Its totient is φ = 6419433348.

The previous prime is 12840823421. The next prime is 12840823519. The reversal of 12840823426 is 62432804821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12840823421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472666 + ... + 499093.

It is an arithmetic number, because the mean of its divisors is an integer number (2408021280).

Almost surely, 2^12840823426 is an apocalyptic number.

12840823426 is a deficient number, since it is larger than the sum of its proper divisors (6423346814).

12840823426 is an equidigital number, since it uses as much as digits as its factorization.

12840823426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978368.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 12840823426 in words is "twelve billion, eight hundred forty million, eight hundred twenty-three thousand, four hundred twenty-six".