18189480 has 32 divisors (see below), whose sum is σ = 54568800. Its totient is φ = 4850496.

The previous prime is 18189469. The next prime is 18189487. The reversal of 18189480 is 8498181.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18189487) 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, 75670 + ... + 75909.

It is an arithmetic number, because the mean of its divisors is an integer number (1705275).

Almost surely, 2^18189480 is an apocalyptic number.

18189480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18189480 is an abundant number, since it is smaller than the sum of its proper divisors (36379320).

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

18189480 is a wasteful number, since it uses less digits than its factorization.

18189480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151593 (or 151589 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 18189480 is about 4264.9126603015. The cubic root of 18189480 is about 262.9905204600.

The spelling of 18189480 in words is "eighteen million, one hundred eighty-nine thousand, four hundred eighty".