13217418 has 40 divisors (see below), whose sum is σ = 30004128. Its totient is φ = 4348296.

The previous prime is 13217363. The next prime is 13217423. The reversal of 13217418 is 81471231.

13217418 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 13217391 and 13217400.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12955 + ... + 13937.

Almost surely, 2^13217418 is an apocalyptic number.

13217418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13217418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15002064).

13217418 is an abundant number, since it is smaller than the sum of its proper divisors (16786710).

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

13217418 is an equidigital number, since it uses as much as digits as its factorization.

13217418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1071 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 13217418 is about 3635.5767080341. The cubic root of 13217418 is about 236.4370551824.

Adding to 13217418 its reverse (81471231), we get a palindrome (94688649).

The spelling of 13217418 in words is "thirteen million, two hundred seventeen thousand, four hundred eighteen".