12946185947 has 4 divisors (see below), whose sum is σ = 12975676560. Its totient is φ = 12916695336.

The previous prime is 12946185943. The next prime is 12946186037. The reversal of 12946185947 is 74958164921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74958164921 = 73 ⋅1026824177.

It is a cyclic number.

It is not a de Polignac number, because 12946185947 - 2² = 12946185943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12946185892 and 12946185901.

It is not an unprimeable number, because it can be changed into a prime (12946185943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14744648 + ... + 14745525.

It is an arithmetic number, because the mean of its divisors is an integer number (3243919140).

Almost surely, 2^12946185947 is an apocalyptic number.

12946185947 is a deficient number, since it is larger than the sum of its proper divisors (29490613).

12946185947 is an equidigital number, since it uses as much as digits as its factorization.

12946185947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29490612.

The product of its digits is 4354560, while the sum is 56.

The spelling of 12946185947 in words is "twelve billion, nine hundred forty-six million, one hundred eighty-five thousand, nine hundred forty-seven".