13224820 has 24 divisors (see below), whose sum is σ = 31739904. Its totient is φ = 4534176.

The previous prime is 13224803. The next prime is 13224821. The reversal of 13224820 is 2842231.

It is a junction number, because it is equal to n+sod(n) for n = 13224791 and 13224800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13224821) 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 7 ways as a sum of consecutive naturals, for example, 47092 + ... + 47371.

It is an arithmetic number, because the mean of its divisors is an integer number (1322496).

Almost surely, 2^13224820 is an apocalyptic number.

13224820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13224820 is an abundant number, since it is smaller than the sum of its proper divisors (18515084).

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

13224820 is a wasteful number, since it uses less digits than its factorization.

13224820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94479 (or 94477 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 13224820 is about 3636.5945608495. The cubic root of 13224820 is about 236.4811833292.

The spelling of 13224820 in words is "thirteen million, two hundred twenty-four thousand, eight hundred twenty".