12340403205 has 32 divisors (see below), whose sum is σ = 21996696960. Its totient is φ = 5865780480.

The previous prime is 12340403191. The next prime is 12340403239. The reversal of 12340403205 is 50230404321.

It is not a de Polignac number, because 12340403205 - 2⁷ = 12340403077 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1085451 + ... + 1096760.

It is an arithmetic number, because the mean of its divisors is an integer number (687396780).

Almost surely, 2^12340403205 is an apocalyptic number.

12340403205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12340403205 is a deficient number, since it is larger than the sum of its proper divisors (9656293755).

12340403205 is a wasteful number, since it uses less digits than its factorization.

12340403205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182261.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 12340403205 its reverse (50230404321), we get a palindrome (62570807526).

The spelling of 12340403205 in words is "twelve billion, three hundred forty million, four hundred three thousand, two hundred five".