18889412 has 12 divisors (see below), whose sum is σ = 33680556. Its totient is φ = 9266400.

The previous prime is 18889393. The next prime is 18889433. The reversal of 18889412 is 21498881.

It can be written as a sum of positive squares in 2 ways, for example, as 5683456 + 13205956 = 2384^2 + 3634^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18889412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44339 + ... + 44762.

It is an arithmetic number, because the mean of its divisors is an integer number (2806713).

Almost surely, 2^18889412 is an apocalyptic number.

It is an amenable number.

18889412 is a deficient number, since it is larger than the sum of its proper divisors (14791144).

18889412 is a wasteful number, since it uses less digits than its factorization.

18889412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89158 (or 89156 counting only the distinct ones).

The product of its digits is 36864, while the sum is 41.

The square root of 18889412 is about 4346.1951175712. The cubic root of 18889412 is about 266.3214498156.

The spelling of 18889412 in words is "eighteen million, eight hundred eighty-nine thousand, four hundred twelve".