13361640242 has 4 divisors (see below), whose sum is σ = 20042460366. Its totient is φ = 6680820120.

The previous prime is 13361640241. The next prime is 13361640251. The reversal of 13361640242 is 24204616331.

13361640242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24204616331 = 7 ⋅3457802333.

It can be written as a sum of positive squares in only one way, i.e., 13043695681 + 317944561 = 114209^2 + 17831^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13361640199 and 13361640208.

It is not an unprimeable number, because it can be changed into a prime (13361640241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340410059 + ... + 3340410062.

Almost surely, 2^13361640242 is an apocalyptic number.

13361640242 is a deficient number, since it is larger than the sum of its proper divisors (6680820124).

13361640242 is an equidigital number, since it uses as much as digits as its factorization.

13361640242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680820123.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 13361640242 in words is "thirteen billion, three hundred sixty-one million, six hundred forty thousand, two hundred forty-two".