13581894 has 32 divisors (see below), whose sum is σ = 28283904. Its totient is φ = 4344480.

The previous prime is 13581863. The next prime is 13581899. The reversal of 13581894 is 49818531.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13581899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15307 + ... + 16169.

It is an arithmetic number, because the mean of its divisors is an integer number (883872).

Almost surely, 2^13581894 is an apocalyptic number.

13581894 is an abundant number, since it is smaller than the sum of its proper divisors (14702010).

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

13581894 is a wasteful number, since it uses less digits than its factorization.

13581894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

The product of its digits is 34560, while the sum is 39.

The square root of 13581894 is about 3685.3621260332. The cubic root of 13581894 is about 238.5906638591.

The spelling of 13581894 in words is "thirteen million, five hundred eighty-one thousand, eight hundred ninety-four".