18226117 has 16 divisors (see below), whose sum is σ = 22861440. Its totient is φ = 14144832.

The previous prime is 18226093. The next prime is 18226121. The reversal of 18226117 is 71162281.

It is a de Polignac number, because none of the positive numbers 2^k-18226117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18226147) 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, 2934 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^18226117 is an apocalyptic number.

It is an amenable number.

18226117 is a deficient number, since it is larger than the sum of its proper divisors (4635323).

18226117 is a wasteful number, since it uses less digits than its factorization.

18226117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852.

The product of its digits is 1344, while the sum is 28.

The square root of 18226117 is about 4269.2056638208. The cubic root of 18226117 is about 263.1669726714.

Adding to 18226117 its reverse (71162281), we get a palindrome (89388398).

The spelling of 18226117 in words is "eighteen million, two hundred twenty-six thousand, one hundred seventeen".