13190018 has 4 divisors (see below), whose sum is σ = 19785030. Its totient is φ = 6595008.

The previous prime is 13190003. The next prime is 13190027. The reversal of 13190018 is 81009131.

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., 9591409 + 3598609 = 3097^2 + 1897^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13189975 and 13190002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3297503 + ... + 3297506.

Almost surely, 2^13190018 is an apocalyptic number.

13190018 is a deficient number, since it is larger than the sum of its proper divisors (6595012).

13190018 is an equidigital number, since it uses as much as digits as its factorization.

13190018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6595011.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 13190018 is about 3631.8064375735. The cubic root of 13190018 is about 236.2735624064.

Adding to 13190018 its reverse (81009131), we get a palindrome (94199149).

The spelling of 13190018 in words is "thirteen million, one hundred ninety thousand, eighteen".