18227605 has 16 divisors (see below), whose sum is σ = 24006528. Its totient is φ = 13176000.

The previous prime is 18227537. The next prime is 18227611. The reversal of 18227605 is 50672281.

It is not a de Polignac number, because 18227605 - 2⁹ = 18227093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9040 + ... + 10870.

It is an arithmetic number, because the mean of its divisors is an integer number (1500408).

Almost surely, 2^18227605 is an apocalyptic number.

It is an amenable number.

18227605 is a deficient number, since it is larger than the sum of its proper divisors (5778923).

18227605 is a wasteful number, since it uses less digits than its factorization.

18227605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 18227605 is about 4269.3799315591. The cubic root of 18227605 is about 263.1741342224.

Adding to 18227605 its reverse (50672281), we get a palindrome (68899886).

The spelling of 18227605 in words is "eighteen million, two hundred twenty-seven thousand, six hundred five".