13818944242 has 4 divisors (see below), whose sum is σ = 20728416366. Its totient is φ = 6909472120.

The previous prime is 13818944239. The next prime is 13818944263. The reversal of 13818944242 is 24244981831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24244981831 = 7 ⋅3463568833.

It can be written as a sum of positive squares in only one way, i.e., 13735605601 + 83338641 = 117199^2 + 9129^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13818944192 and 13818944201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3454736059 + ... + 3454736062.

Almost surely, 2^13818944242 is an apocalyptic number.

13818944242 is a deficient number, since it is larger than the sum of its proper divisors (6909472124).

13818944242 is an equidigital number, since it uses as much as digits as its factorization.

13818944242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6909472123.

The product of its digits is 442368, while the sum is 46.

The spelling of 13818944242 in words is "thirteen billion, eight hundred eighteen million, nine hundred forty-four thousand, two hundred forty-two".