18089835 has 16 divisors (see below), whose sum is σ = 29043744. Its totient is φ = 9614592.

The previous prime is 18089809. The next prime is 18089839. The reversal of 18089835 is 53898081.

It is not a de Polignac number, because 18089835 - 2⁵ = 18089803 is a prime.

It is a super-4 number, since 4×18089835⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (18089839) 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 15 ways as a sum of consecutive naturals, for example, 2769 + ... + 6621.

It is an arithmetic number, because the mean of its divisors is an integer number (1815234).

Almost surely, 2^18089835 is an apocalyptic number.

18089835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18089835 is a deficient number, since it is larger than the sum of its proper divisors (10953909).

18089835 is a wasteful number, since it uses less digits than its factorization.

18089835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4174.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 18089835 is about 4253.2146665787. The cubic root of 18089835 is about 262.5094055587.

The spelling of 18089835 in words is "eighteen million, eighty-nine thousand, eight hundred thirty-five".