18889012 has 12 divisors (see below), whose sum is σ = 33298020. Its totient is φ = 9375296.

The previous prime is 18889009. The next prime is 18889019. The reversal of 18889012 is 21098881.

It can be written as a sum of positive squares in 2 ways, for example, as 11249316 + 7639696 = 3354^2 + 2764^2 .

It is a super-2 number, since 2×18889012² = 713589548672288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18889019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16687 + ... + 17782.

It is an arithmetic number, because the mean of its divisors is an integer number (2774835).

Almost surely, 2^18889012 is an apocalyptic number.

It is an amenable number.

18889012 is a deficient number, since it is larger than the sum of its proper divisors (14409008).

18889012 is a wasteful number, since it uses less digits than its factorization.

18889012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34610 (or 34608 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 18889012 is about 4346.1491000655. The cubic root of 18889012 is about 266.3195699383.

The spelling of 18889012 in words is "eighteen million, eight hundred eighty-nine thousand, twelve".