13213618 has 32 divisors (see below), whose sum is σ = 22680000. Its totient is φ = 5718720.

The previous prime is 13213579. The next prime is 13213667. The reversal of 13213618 is 81631231.

It is a junction number, because it is equal to n+sod(n) for n = 13213592 and 13213601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88608 + ... + 88756.

It is an arithmetic number, because the mean of its divisors is an integer number (708750).

Almost surely, 2^13213618 is an apocalyptic number.

13213618 is a deficient number, since it is larger than the sum of its proper divisors (9466382).

13213618 is a wasteful number, since it uses less digits than its factorization.

13213618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330.

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

The square root of 13213618 is about 3635.0540573697. The cubic root of 13213618 is about 236.4143945052.

Adding to 13213618 its reverse (81631231), we get a palindrome (94844849).

It can be divided in two parts, 13213 and 618, that added together give a palindrome (13831).

The spelling of 13213618 in words is "thirteen million, two hundred thirteen thousand, six hundred eighteen".