18099005 has 8 divisors (see below), whose sum is σ = 22075224. Its totient is φ = 14241600.

The previous prime is 18098923. The next prime is 18099007. The reversal of 18099005 is 50099081.

It can be written as a sum of positive squares in 4 ways, for example, as 942841 + 17156164 = 971^2 + 4142^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18099005 - 2¹⁴ = 18082621 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 (18099007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29366 + ... + 29975.

It is an arithmetic number, because the mean of its divisors is an integer number (2759403).

Almost surely, 2^18099005 is an apocalyptic number.

It is an amenable number.

18099005 is a deficient number, since it is larger than the sum of its proper divisors (3976219).

18099005 is an equidigital number, since it uses as much as digits as its factorization.

18099005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59407.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 18099005 is about 4254.2925381313. The cubic root of 18099005 is about 262.5537546754.

The spelling of 18099005 in words is "eighteen million, ninety-nine thousand, five".