13018660 has 12 divisors (see below), whose sum is σ = 27339228. Its totient is φ = 5207456.

The previous prime is 13018639. The next prime is 13018669. The reversal of 13018660 is 6681031.

It can be written as a sum of positive squares in 2 ways, for example, as 2637376 + 10381284 = 1624^2 + 3222^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (13018669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325447 + ... + 325486.

It is an arithmetic number, because the mean of its divisors is an integer number (2278269).

Almost surely, 2^13018660 is an apocalyptic number.

13018660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13018660 is an abundant number, since it is smaller than the sum of its proper divisors (14320568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13018660 is a wasteful number, since it uses less digits than its factorization.

13018660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650942 (or 650940 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 13018660 is about 3608.1380239675. The cubic root of 13018660 is about 235.2459173081.

Adding to 13018660 its reverse (6681031), we get a palindrome (19699691).

The spelling of 13018660 in words is "thirteen million, eighteen thousand, six hundred sixty".