13836820 has 12 divisors (see below), whose sum is σ = 29057364. Its totient is φ = 5534720.

The previous prime is 13836817. The next prime is 13836821. The reversal of 13836820 is 2863831.

It can be written as a sum of positive squares in 2 ways, for example, as 3104644 + 10732176 = 1762^2 + 3276^2 .

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13836821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345901 + ... + 345940.

It is an arithmetic number, because the mean of its divisors is an integer number (2421447).

Almost surely, 2^13836820 is an apocalyptic number.

13836820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13836820 is an abundant number, since it is smaller than the sum of its proper divisors (15220544).

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

13836820 is a wasteful number, since it uses less digits than its factorization.

13836820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691850 (or 691848 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 13836820 is about 3719.7876283465. The cubic root of 13836820 is about 240.0741668928.

The spelling of 13836820 in words is "thirteen million, eight hundred thirty-six thousand, eight hundred twenty".