18393005 has 4 divisors (see below), whose sum is σ = 22071612. Its totient is φ = 14714400.

The previous prime is 18392999. The next prime is 18393059. The reversal of 18393005 is 50039381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10023556 + 8369449 = 3166^2 + 2893^2 .

It is not a de Polignac number, because 18393005 - 2¹⁴ = 18376621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1839296 + ... + 1839305.

It is an arithmetic number, because the mean of its divisors is an integer number (5517903).

Almost surely, 2^18393005 is an apocalyptic number.

It is an amenable number.

18393005 is a deficient number, since it is larger than the sum of its proper divisors (3678607).

18393005 is an equidigital number, since it uses as much as digits as its factorization.

18393005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3678606.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 18393005 is about 4288.7066815067. The cubic root of 18393005 is about 263.9677656159.

The spelling of 18393005 in words is "eighteen million, three hundred ninety-three thousand, five".