13523418 has 12 divisors (see below), whose sum is σ = 29300778. Its totient is φ = 4507800.

The previous prime is 13523413. The next prime is 13523429. The reversal of 13523418 is 81432531.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13373649 + 149769 = 3657^2 + 387^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13523391 and 13523400.

It is not an unprimeable number, because it can be changed into a prime (13523413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 375633 + ... + 375668.

Almost surely, 2^13523418 is an apocalyptic number.

13523418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13523418 is an abundant number, since it is smaller than the sum of its proper divisors (15777360).

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

13523418 is a wasteful number, since it uses less digits than its factorization.

13523418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751309 (or 751306 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 13523418 is about 3677.4200195246. The cubic root of 13523418 is about 238.2477588465.

Adding to 13523418 its reverse (81432531), we get a palindrome (94955949).

The spelling of 13523418 in words is "thirteen million, five hundred twenty-three thousand, four hundred eighteen".