1373642306018 has 4 divisors (see below), whose sum is σ = 2060463459030. Its totient is φ = 686821153008.

The previous prime is 1373642306017. The next prime is 1373642306033. The reversal of 1373642306018 is 8106032463731.

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., 1243410096889 + 130232209129 = 1115083^2 + 360877^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1373642306018.

It is not an unprimeable number, because it can be changed into a prime (1373642306017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343410576503 + ... + 343410576506.

Almost surely, 2^{1373642306018} is an apocalyptic number.

1373642306018 is a deficient number, since it is larger than the sum of its proper divisors (686821153012).

1373642306018 is an equidigital number, since it uses as much as digits as its factorization.

1373642306018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686821153011.

The product of its (nonzero) digits is 435456, while the sum is 44.

Adding to 1373642306018 its reverse (8106032463731), we get a palindrome (9479674769749).

The spelling of 1373642306018 in words is "one trillion, three hundred seventy-three billion, six hundred forty-two million, three hundred six thousand, eighteen".