13543668 has 36 divisors (see below), whose sum is σ = 34416928. Its totient is φ = 4490640.

The previous prime is 13543633. The next prime is 13543669. The reversal of 13543668 is 86634531.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13543669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6705 + ... + 8487.

Almost surely, 2^13543668 is an apocalyptic number.

13543668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13543668 is an abundant number, since it is smaller than the sum of its proper divisors (20873260).

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

13543668 is a wasteful number, since it uses less digits than its factorization.

13543668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004 (or 1999 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 13543668 is about 3680.1722785761. The cubic root of 13543668 is about 238.3666171370.

The spelling of 13543668 in words is "thirteen million, five hundred forty-three thousand, six hundred sixty-eight".