18289012 has 24 divisors (see below), whose sum is σ = 36671040. Its totient is φ = 7818240.

The previous prime is 18289009. The next prime is 18289013. The reversal of 18289012 is 21098281.

It is a happy number.

It is a super-2 number, since 2×18289012² = 668975919872288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18289013) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 17439 + ... + 18457.

It is an arithmetic number, because the mean of its divisors is an integer number (1527960).

Almost surely, 2^18289012 is an apocalyptic number.

It is an amenable number.

18289012 is an abundant number, since it is smaller than the sum of its proper divisors (18382028).

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

18289012 is a wasteful number, since it uses less digits than its factorization.

18289012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1669 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18289012 is about 4276.5654443724. The cubic root of 18289012 is about 263.4693388489.

The spelling of 18289012 in words is "eighteen million, two hundred eighty-nine thousand, twelve".