12340465905 has 16 divisors (see below), whose sum is σ = 19765617984. Its totient is φ = 6574624320.

The previous prime is 12340465877. The next prime is 12340465939. The reversal of 12340465905 is 50956404321.

It is not a de Polignac number, because 12340465905 - 2⁵ = 12340465873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420166 + ... + 448575.

It is an arithmetic number, because the mean of its divisors is an integer number (1235351124).

Almost surely, 2^12340465905 is an apocalyptic number.

12340465905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12340465905 is a deficient number, since it is larger than the sum of its proper divisors (7425152079).

12340465905 is an equidigital number, since it uses as much as digits as its factorization.

12340465905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869696.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 12340465905 in words is "twelve billion, three hundred forty million, four hundred sixty-five thousand, nine hundred five".