13393018 has 8 divisors (see below), whose sum is σ = 20364948. Its totient is φ = 6604704.

The previous prime is 13393013. The next prime is 13393033. The reversal of 13393018 is 81039331.

It can be written as a sum of positive squares in 2 ways, for example, as 11812969 + 1580049 = 3437^2 + 1257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13393018² = 358745862296648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13393013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45721 + ... + 46012.

Almost surely, 2^13393018 is an apocalyptic number.

13393018 is a deficient number, since it is larger than the sum of its proper divisors (6971930).

13393018 is an equidigital number, since it uses as much as digits as its factorization.

13393018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91808.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 13393018 is about 3659.6472507607. The cubic root of 13393018 is about 237.4795136531.

The spelling of 13393018 in words is "thirteen million, three hundred ninety-three thousand, eighteen".