18868226 has 16 divisors (see below), whose sum is σ = 30622200. Its totient is φ = 8667648.

The previous prime is 18868207. The next prime is 18868229. The reversal of 18868226 is 62286881.

It can be written as a sum of positive squares in 4 ways, for example, as 18447025 + 421201 = 4295^2 + 649^2 .

It is not an unprimeable number, because it can be changed into a prime (18868229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4370 + ... + 7538.

Almost surely, 2^18868226 is an apocalyptic number.

18868226 is a deficient number, since it is larger than the sum of its proper divisors (11753974).

18868226 is a wasteful number, since it uses less digits than its factorization.

18868226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3413.

The product of its digits is 73728, while the sum is 41.

The square root of 18868226 is about 4343.7571294906. The cubic root of 18868226 is about 266.2218455686.

The spelling of 18868226 in words is "eighteen million, eight hundred sixty-eight thousand, two hundred twenty-six".