13307818 has 8 divisors (see below), whose sum is σ = 20167812. Its totient is φ = 6585216.

The previous prime is 13307813. The next prime is 13307843. The reversal of 13307818 is 81870331.

It can be written as a sum of positive squares in 2 ways, for example, as 12510369 + 797449 = 3537^2 + 893^2 .

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

It is a super-2 number, since 2×13307818² = 354196039842248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13307818.

It is not an unprimeable number, because it can be changed into a prime (13307813) 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, 34105 + ... + 34492.

Almost surely, 2^13307818 is an apocalyptic number.

13307818 is a deficient number, since it is larger than the sum of its proper divisors (6859994).

13307818 is an equidigital number, since it uses as much as digits as its factorization.

13307818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68696.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 13307818 is about 3647.9882127003. The cubic root of 13307818 is about 236.9748648473.

The spelling of 13307818 in words is "thirteen million, three hundred seven thousand, eight hundred eighteen".