18089396 has 12 divisors (see below), whose sum is σ = 34091652. Its totient is φ = 8348928.

The previous prime is 18089371. The next prime is 18089413. The reversal of 18089396 is 69398081.

It can be written as a sum of positive squares in 2 ways, for example, as 3189796 + 14899600 = 1786^2 + 3860^2 .

It is a congruent number.

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, 173885 + ... + 173988.

It is an arithmetic number, because the mean of its divisors is an integer number (2840971).

Almost surely, 2^18089396 is an apocalyptic number.

It is an amenable number.

18089396 is a deficient number, since it is larger than the sum of its proper divisors (16002256).

18089396 is a wasteful number, since it uses less digits than its factorization.

18089396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347890 (or 347888 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 18089396 is about 4253.1630582427. The cubic root of 18089396 is about 262.5072820353.

The spelling of 18089396 in words is "eighteen million, eighty-nine thousand, three hundred ninety-six".