18132388 has 6 divisors (see below), whose sum is σ = 31731686. Its totient is φ = 9066192.

The previous prime is 18132377. The next prime is 18132391. The reversal of 18132388 is 88323181.

It can be written as a sum of positive squares in only one way, i.e., 15936064 + 2196324 = 3992^2 + 1482^2 .

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, 2266545 + ... + 2266552.

Almost surely, 2^18132388 is an apocalyptic number.

It is an amenable number.

18132388 is a deficient number, since it is larger than the sum of its proper divisors (13599298).

18132388 is a wasteful number, since it uses less digits than its factorization.

18132388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4533101 (or 4533099 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 18132388 is about 4258.2141796767. The cubic root of 18132388 is about 262.7150793578.

The spelling of 18132388 in words is "eighteen million, one hundred thirty-two thousand, three hundred eighty-eight".