18000080 has 40 divisors (see below), whose sum is σ = 47830272. Its totient is φ = 6171264.

The previous prime is 18000067. The next prime is 18000089. The reversal of 18000080 is 8000081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18000089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15512 + ... + 16631.

Almost surely, 2^18000080 is an apocalyptic number.

18000080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18000080 is an abundant number, since it is smaller than the sum of its proper divisors (29830192).

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

18000080 is a wasteful number, since it uses less digits than its factorization.

18000080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32163 (or 32157 counting only the distinct ones).

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

The square root of 18000080 is about 4242.6501151992. The cubic root of 18000080 is about 262.0745276783.

Subtracting from 18000080 its reverse (8000081), we obtain a palindrome (9999999).

The spelling of 18000080 in words is "eighteen million, eighty", and thus it is an aban number and an uban number.