13543820 has 24 divisors (see below), whose sum is σ = 28655424. Its totient is φ = 5376896.

The previous prime is 13543811. The next prime is 13543843. The reversal of 13543820 is 2834531.

13543820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13543820.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269 + ... + 5211.

It is an arithmetic number, because the mean of its divisors is an integer number (1193976).

Almost surely, 2^13543820 is an apocalyptic number.

13543820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13543820 is an abundant number, since it is smaller than the sum of its proper divisors (15111604).

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

13543820 is a wasteful number, since it uses less digits than its factorization.

13543820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089 (or 5087 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 13543820 is about 3680.1929297253. The cubic root of 13543820 is about 238.3675088597.

The spelling of 13543820 in words is "thirteen million, five hundred forty-three thousand, eight hundred twenty".