18589005 has 12 divisors (see below), whose sum is σ = 32221020. Its totient is φ = 9914112.

The previous prime is 18589001. The next prime is 18589013. The reversal of 18589005 is 50098581.

It can be written as a sum of positive squares in 2 ways, for example, as 9998244 + 8590761 = 3162^2 + 2931^2 .

It is not a de Polignac number, because 18589005 - 2² = 18589001 is a prime.

It is a super-2 number, since 2×18589005² = 691102213780050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18589001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206500 + ... + 206589.

It is an arithmetic number, because the mean of its divisors is an integer number (2685085).

Almost surely, 2^18589005 is an apocalyptic number.

18589005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18589005 is a deficient number, since it is larger than the sum of its proper divisors (13632015).

18589005 is a wasteful number, since it uses less digits than its factorization.

18589005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413100 (or 413097 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 18589005 is about 4311.4968398458. The cubic root of 18589005 is about 264.9020879528.

The spelling of 18589005 in words is "eighteen million, five hundred eighty-nine thousand, five".