18780080 has 40 divisors (see below), whose sum is σ = 47635344. Its totient is φ = 6828800.

The previous prime is 18780077. The next prime is 18780089. The reversal of 18780080 is 8008781.

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

It is not an unprimeable number, because it can be changed into a prime (18780089) 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 7 ways as a sum of consecutive naturals, for example, 9791 + ... + 11550.

Almost surely, 2^18780080 is an apocalyptic number.

18780080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18780080 is an abundant number, since it is smaller than the sum of its proper divisors (28855264).

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

18780080 is a wasteful number, since it uses less digits than its factorization.

18780080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21365 (or 21359 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 18780080 is about 4333.5989662173. The cubic root of 18780080 is about 265.8066320363.

The spelling of 18780080 in words is "eighteen million, seven hundred eighty thousand, eighty".