12980240818 has 4 divisors (see below), whose sum is σ = 19470361230. Its totient is φ = 6490120408.

The previous prime is 12980240807. The next prime is 12980240821. The reversal of 12980240818 is 81804208921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81804208921 = 401 ⋅204000521.

It can be written as a sum of positive squares in only one way, i.e., 12693852889 + 286387929 = 112667^2 + 16923^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245060203 + ... + 3245060206.

Almost surely, 2^12980240818 is an apocalyptic number.

12980240818 is a deficient number, since it is larger than the sum of its proper divisors (6490120412).

12980240818 is an equidigital number, since it uses as much as digits as its factorization.

12980240818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490120411.

The product of its (nonzero) digits is 73728, while the sum is 43.

The spelling of 12980240818 in words is "twelve billion, nine hundred eighty million, two hundred forty thousand, eight hundred eighteen".