18089235 has 24 divisors (see below), whose sum is σ = 33006480. Its totient is φ = 9139392.

The previous prime is 18089233. The next prime is 18089237. The reversal of 18089235 is 53298081.

It is an interprime number because it is at equal distance from previous prime (18089233) and next prime (18089237).

It is not a de Polignac number, because 18089235 - 2¹ = 18089233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18089235.

It is not an unprimeable number, because it can be changed into a prime (18089231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9724 + ... + 11433.

It is an arithmetic number, because the mean of its divisors is an integer number (1375270).

Almost surely, 2^18089235 is an apocalyptic number.

18089235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18089235 is a deficient number, since it is larger than the sum of its proper divisors (14917245).

18089235 is a wasteful number, since it uses less digits than its factorization.

18089235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21187 (or 21184 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 18089235 is about 4253.1441311105. The cubic root of 18089235 is about 262.5065032402.

The spelling of 18089235 in words is "eighteen million, eighty-nine thousand, two hundred thirty-five".