13321718 has 4 divisors (see below), whose sum is σ = 19982580. Its totient is φ = 6660858.

The previous prime is 13321699. The next prime is 13321741. The reversal of 13321718 is 81712331.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330428 + ... + 3330431.

It is an arithmetic number, because the mean of its divisors is an integer number (4995645).

Almost surely, 2^13321718 is an apocalyptic number.

13321718 is a deficient number, since it is larger than the sum of its proper divisors (6660862).

13321718 is an equidigital number, since it uses as much as digits as its factorization.

13321718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660861.

The product of its digits is 1008, while the sum is 26.

The square root of 13321718 is about 3649.8928751403. The cubic root of 13321718 is about 237.0573427923.

The spelling of 13321718 in words is "thirteen million, three hundred twenty-one thousand, seven hundred eighteen".