18080000 has 90 divisors (see below), whose sum is σ = 45496374. Its totient is φ = 7168000.

The previous prime is 18079987. The next prime is 18080003. The reversal of 18080000 is 8081.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 12845056 + 5234944 = 3584^2 + 2288^2 .

It is not an unprimeable number, because it can be changed into a prime (18080003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 159944 + ... + 160056.

Almost surely, 2^18080000 is an apocalyptic number.

18080000 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 18080000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22748187).

18080000 is an abundant number, since it is smaller than the sum of its proper divisors (27416374).

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

18080000 is an frugal number, since it uses more digits than its factorization.

18080000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 18080000 is about 4252.0583250939. The cubic root of 18080000 is about 262.4618236242.

Adding to 18080000 its reverse (8081), we get a palindrome (18088081).

The spelling of 18080000 in words is "eighteen million, eighty thousand".