27204163220 has 54 divisors (see below), whose sum is σ = 61883114202. Its totient is φ = 10041073536.

The previous prime is 27204163219. The next prime is 27204163223. The reversal of 27204163220 is 2236140272.

It can be written as a sum of positive squares in 9 ways, for example, as 26831750416 + 372412804 = 163804^2 + 19298^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27204163223) 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 17 ways as a sum of consecutive naturals, for example, 9587642 + ... + 9590478.

Almost surely, 2^27204163220 is an apocalyptic number.

27204163220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27204163220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30941557101).

27204163220 is an abundant number, since it is smaller than the sum of its proper divisors (34678950982).

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

27204163220 is an equidigital number, since it uses as much as digits as its factorization.

27204163220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5709 (or 2857 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The spelling of 27204163220 in words is "twenty-seven billion, two hundred four million, one hundred sixty-three thousand, two hundred twenty".