18378148 has 6 divisors (see below), whose sum is σ = 32161766. Its totient is φ = 9189072.

The previous prime is 18378091. The next prime is 18378169. The reversal of 18378148 is 84187381.

It can be written as a sum of positive squares in only one way, i.e., 18249984 + 128164 = 4272^2 + 358^2 .

It is a super-3 number, since 3×18378148³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18378148.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2297265 + ... + 2297272.

Almost surely, 2^18378148 is an apocalyptic number.

It is an amenable number.

18378148 is a deficient number, since it is larger than the sum of its proper divisors (13783618).

18378148 is a wasteful number, since it uses less digits than its factorization.

18378148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594541 (or 4594539 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 18378148 is about 4286.9742243219. The cubic root of 18378148 is about 263.8966729096.

The spelling of 18378148 in words is "eighteen million, three hundred seventy-eight thousand, one hundred forty-eight".