18808020 has 288 divisors, whose sum is σ = 75479040. Its totient is φ = 3674880.

The previous prime is 18808007. The next prime is 18808021. The reversal of 18808020 is 2080881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18808021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 318751 + ... + 318809.

It is an arithmetic number, because the mean of its divisors is an integer number (262080).

Almost surely, 2^18808020 is an apocalyptic number.

18808020 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 18808020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37739520).

18808020 is an abundant number, since it is smaller than the sum of its proper divisors (56671020).

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

18808020 is a wasteful number, since it uses less digits than its factorization.

18808020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 18808020 is about 4336.8214166599. The cubic root of 18808020 is about 265.9383843567.

The spelling of 18808020 in words is "eighteen million, eight hundred eight thousand, twenty".