13385818 has 4 divisors (see below), whose sum is σ = 20078730. Its totient is φ = 6692908.

The previous prime is 13385809. The next prime is 13385819. The reversal of 13385818 is 81858331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81858331 = 73 ⋅1121347.

It can be written as a sum of positive squares in only one way, i.e., 12581209 + 804609 = 3547^2 + 897^2 .

It is not an unprimeable number, because it can be changed into a prime (13385819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3346453 + ... + 3346456.

Almost surely, 2^13385818 is an apocalyptic number.

13385818 is a deficient number, since it is larger than the sum of its proper divisors (6692912).

13385818 is an equidigital number, since it uses as much as digits as its factorization.

13385818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6692911.

The product of its digits is 23040, while the sum is 37.

The square root of 13385818 is about 3658.6634171511. The cubic root of 13385818 is about 237.4369502072.

The spelling of 13385818 in words is "thirteen million, three hundred eighty-five thousand, eight hundred eighteen".