18214605 has 16 divisors (see below), whose sum is σ = 32381760. Its totient is φ = 9714384.

The previous prime is 18214601. The next prime is 18214607. The reversal of 18214605 is 50641281.

It is not a de Polignac number, because 18214605 - 2² = 18214601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18214601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67327 + ... + 67596.

It is an arithmetic number, because the mean of its divisors is an integer number (2023860).

Almost surely, 2^18214605 is an apocalyptic number.

18214605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18214605 is a deficient number, since it is larger than the sum of its proper divisors (14167155).

18214605 is a wasteful number, since it uses less digits than its factorization.

18214605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134937 (or 134931 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18214605 is about 4267.8571906754. The cubic root of 18214605 is about 263.1115537312. Note that the first 3 decimals are identical.

Adding to 18214605 its reverse (50641281), we get a palindrome (68855886).

The spelling of 18214605 in words is "eighteen million, two hundred fourteen thousand, six hundred five".