12945370418 has 18 divisors (see below), whose sum is σ = 19890771327. Its totient is φ = 6318778620.

The previous prime is 12945370369. The next prime is 12945370423. The reversal of 12945370418 is 81407354921.

It can be written as a sum of positive squares in only one way, i.e., 6472685209 + 6472685209 = 80453^2 + 80453^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=80453.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6918023 + ... + 6919893.

Almost surely, 2^12945370418 is an apocalyptic number.

12945370418 is a deficient number, since it is larger than the sum of its proper divisors (6945400909).

12945370418 is an frugal number, since it uses more digits than its factorization.

12945370418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 12945370418 in words is "twelve billion, nine hundred forty-five million, three hundred seventy thousand, four hundred eighteen".