13646 has 4 divisors (see below), whose sum is σ = 20472. Its totient is φ = 6822.

The previous prime is 13633. The next prime is 13649. The reversal of 13646 is 64631.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13649) by changing a digit.

13646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410 + ... + 3413.

It is an arithmetic number, because the mean of its divisors is an integer number (5118).

2¹³⁶⁴⁶ is an apocalyptic number.

13646 is a deficient number, since it is larger than the sum of its proper divisors (6826).

13646 is an equidigital number, since it uses as much as digits as its factorization.

13646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6825.

The product of its digits is 432, while the sum is 20.

The square root of 13646 is about 116.8160947815. The cubic root of 13646 is about 23.8965454295.

The spelling of 13646 in words is "thirteen thousand, six hundred forty-six".