18608220 has 72 divisors (see below), whose sum is σ = 59426640. Its totient is φ = 4700160.

The previous prime is 18608197. The next prime is 18608221. The reversal of 18608220 is 2280681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18608221) 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 23 ways as a sum of consecutive naturals, for example, 700 + ... + 6140.

It is an arithmetic number, because the mean of its divisors is an integer number (825370).

Almost surely, 2^18608220 is an apocalyptic number.

18608220 is a gapful number since it is divisible by the number (10) 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 18608220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29713320).

18608220 is an abundant number, since it is smaller than the sum of its proper divisors (40818420).

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

18608220 is a wasteful number, since it uses less digits than its factorization.

18608220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5475 (or 5470 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 18608220 is about 4313.7246087343. The cubic root of 18608220 is about 264.9933307922.

The spelling of 18608220 in words is "eighteen million, six hundred eight thousand, two hundred twenty".