18806080 has 56 divisors (see below), whose sum is σ = 47429928. Its totient is φ = 7077888.

The previous prime is 18806077. The next prime is 18806107. The reversal of 18806080 is 8060881.

It can be written as a sum of positive squares in 4 ways, for example, as 350464 + 18455616 = 592^2 + 4296^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3712 + ... + 7168.

It is an arithmetic number, because the mean of its divisors is an integer number (846963).

Almost surely, 2^18806080 is an apocalyptic number.

18806080 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 18806080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23714964).

18806080 is an abundant number, since it is smaller than the sum of its proper divisors (28623848).

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

18806080 is a wasteful number, since it uses less digits than its factorization.

18806080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491 (or 3481 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 18806080 is about 4336.5977447764. The cubic root of 18806080 is about 265.9292404170.

The spelling of 18806080 in words is "eighteen million, eight hundred six thousand, eighty".