18063385 has 4 divisors (see below), whose sum is σ = 21676068. Its totient is φ = 14450704.

The previous prime is 18063379. The next prime is 18063391. The reversal of 18063385 is 58336081.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (18063379) and next prime (18063391).

It can be written as a sum of positive squares in 2 ways, for example, as 2350089 + 15713296 = 1533^2 + 3964^2 .

It is a cyclic number.

It is not a de Polignac number, because 18063385 - 2¹⁹ = 17539097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18063385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806334 + ... + 1806343.

It is an arithmetic number, because the mean of its divisors is an integer number (5419017).

Almost surely, 2^18063385 is an apocalyptic number.

It is an amenable number.

18063385 is a deficient number, since it is larger than the sum of its proper divisors (3612683).

18063385 is an equidigital number, since it uses as much as digits as its factorization.

18063385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612682.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18063385 is about 4250.1041163717. The cubic root of 18063385 is about 262.3814006947.

The spelling of 18063385 in words is "eighteen million, sixty-three thousand, three hundred eighty-five".