13566303220 has 24 divisors (see below), whose sum is σ = 28492005024. Its totient is φ = 5425994016.

The previous prime is 13566303217. The next prime is 13566303227. The reversal of 13566303220 is 2230366531.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13566303227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228687 + ... + 281833.

It is an arithmetic number, because the mean of its divisors is an integer number (1187166876).

Almost surely, 2^13566303220 is an apocalyptic number.

13566303220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13566303220 is an abundant number, since it is smaller than the sum of its proper divisors (14925701804).

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

13566303220 is a wasteful number, since it uses less digits than its factorization.

13566303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65919 (or 65917 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 13566303220 its reverse (2230366531), we get a palindrome (15796669751).

The spelling of 13566303220 in words is "thirteen billion, five hundred sixty-six million, three hundred three thousand, two hundred twenty".