18089770 has 8 divisors (see below), whose sum is σ = 32561604. Its totient is φ = 7235904.

The previous prime is 18089737. The next prime is 18089789. The reversal of 18089770 is 7798081.

It can be written as a sum of positive squares in 2 ways, for example, as 18071001 + 18769 = 4251^2 + 137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 904479 + ... + 904498.

Almost surely, 2^18089770 is an apocalyptic number.

18089770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18089770 is a deficient number, since it is larger than the sum of its proper divisors (14471834).

18089770 is a wasteful number, since it uses less digits than its factorization.

18089770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808984.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 18089770 is about 4253.2070252928. The cubic root of 18089770 is about 262.5090911439.

The spelling of 18089770 in words is "eighteen million, eighty-nine thousand, seven hundred seventy".