18089001 has 40 divisors (see below), whose sum is σ = 31448384. Its totient is φ = 10147680.

The previous prime is 18088997. The next prime is 18089009. The reversal of 18089001 is 10098081.

It is not a de Polignac number, because 18089001 - 2² = 18088997 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18089009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 34326 + ... + 34848.

Almost surely, 2^18089001 is an apocalyptic number.

It is an amenable number.

18089001 is a deficient number, since it is larger than the sum of its proper divisors (13359383).

18089001 is an equidigital number, since it uses as much as digits as its factorization.

18089001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 18089001 is about 4253.1166219609. The cubic root of 18089001 is about 262.5053713187.

The spelling of 18089001 in words is "eighteen million, eighty-nine thousand, one".