12520363028818 has 4 divisors (see below), whose sum is σ = 18780544543230. Its totient is φ = 6260181514408.

The previous prime is 12520363028813. The next prime is 12520363028839. The reversal of 12520363028818 is 81882036302521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9896730852649 + 2623632176169 = 3145907^2 + 1619763^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12520363028813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3130090757203 + ... + 3130090757206.

Almost surely, 2^{12520363028818} is an apocalyptic number.

12520363028818 is a deficient number, since it is larger than the sum of its proper divisors (6260181514412).

12520363028818 is an equidigital number, since it uses as much as digits as its factorization.

12520363028818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260181514411.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 12520363028818 in words is "twelve trillion, five hundred twenty billion, three hundred sixty-three million, twenty-eight thousand, eight hundred eighteen".