18945160 has 32 divisors (see below), whose sum is σ = 45906840. Its totient is φ = 6994944.

The previous prime is 18945151. The next prime is 18945161. The reversal of 18945160 is 6154981.

It can be written as a sum of positive squares in 4 ways, for example, as 15507844 + 3437316 = 3938^2 + 1854^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18945161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17697 + ... + 18736.

Almost surely, 2^18945160 is an apocalyptic number.

18945160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18945160 is an abundant number, since it is smaller than the sum of its proper divisors (26961680).

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

18945160 is a wasteful number, since it uses less digits than its factorization.

18945160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36457 (or 36453 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18945160 is about 4352.6038184057. The cubic root of 18945160 is about 266.5831891486.

The spelling of 18945160 in words is "eighteen million, nine hundred forty-five thousand, one hundred sixty".