18981152 has 24 divisors (see below), whose sum is σ = 39337200. Its totient is φ = 8990784.

The previous prime is 18981121. The next prime is 18981161. The reversal of 18981152 is 25118981.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15002 + ... + 16217.

It is an arithmetic number, because the mean of its divisors is an integer number (1639050).

Almost surely, 2^18981152 is an apocalyptic number.

It is an amenable number.

18981152 is an abundant number, since it is smaller than the sum of its proper divisors (20356048).

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

18981152 is a wasteful number, since it uses less digits than its factorization.

18981152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31248 (or 31240 counting only the distinct ones).

The product of its digits is 5760, while the sum is 35.

The square root of 18981152 is about 4356.7363932191. The cubic root of 18981152 is about 266.7519005318.

The spelling of 18981152 in words is "eighteen million, nine hundred eighty-one thousand, one hundred fifty-two".