18089501 has 12 divisors (see below), whose sum is σ = 19500480. Its totient is φ = 16733880.

The previous prime is 18089497. The next prime is 18089503. The reversal of 18089501 is 10598081.

It is a happy number.

It is not a de Polignac number, because 18089501 - 2² = 18089497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18089503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41756 + ... + 42186.

It is an arithmetic number, because the mean of its divisors is an integer number (1625040).

Almost surely, 2^18089501 is an apocalyptic number.

It is an amenable number.

18089501 is a deficient number, since it is larger than the sum of its proper divisors (1410979).

18089501 is an equidigital number, since it uses as much as digits as its factorization.

18089501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 18089501 is about 4253.1754019791. The cubic root of 18089501 is about 262.5077899427.

The spelling of 18089501 in words is "eighteen million, eighty-nine thousand, five hundred one".