13018664 has 8 divisors (see below), whose sum is σ = 24410010. Its totient is φ = 6509328.

The previous prime is 13018639. The next prime is 13018669. The reversal of 13018664 is 46681031.

It can be written as a sum of positive squares in only one way, i.e., 11957764 + 1060900 = 3458^2 + 1030^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×13018664² = 338971224689792, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 813659 + ... + 813674.

Almost surely, 2^13018664 is an apocalyptic number.

It is an amenable number.

13018664 is a deficient number, since it is larger than the sum of its proper divisors (11391346).

13018664 is a wasteful number, since it uses less digits than its factorization.

13018664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627339 (or 1627335 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 13018664 is about 3608.1385782700. The cubic root of 13018664 is about 235.2459414013.

Adding to 13018664 its reverse (46681031), we get a palindrome (59699695).

The spelling of 13018664 in words is "thirteen million, eighteen thousand, six hundred sixty-four".