13312018 has 4 divisors (see below), whose sum is σ = 19968030. Its totient is φ = 6656008.

The previous prime is 13312001. The next prime is 13312021. The reversal of 13312018 is 81021331.

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., 9259849 + 4052169 = 3043^2 + 2013^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13311986 and 13312004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328003 + ... + 3328006.

Almost surely, 2^13312018 is an apocalyptic number.

13312018 is a deficient number, since it is larger than the sum of its proper divisors (6656012).

13312018 is an equidigital number, since it uses as much as digits as its factorization.

13312018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656011.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 13312018 is about 3648.5638270421. The cubic root of 13312018 is about 236.9997922933. Note that the first 3 decimals are identical.

Adding to 13312018 its reverse (81021331), we get a palindrome (94333349).

The spelling of 13312018 in words is "thirteen million, three hundred twelve thousand, eighteen".