18145226 has 16 divisors (see below), whose sum is σ = 30384288. Its totient is φ = 8055600.

The previous prime is 18145223. The next prime is 18145249. The reversal of 18145226 is 62254181.

It is not an unprimeable number, because it can be changed into a prime (18145223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8645 + ... + 10536.

It is an arithmetic number, because the mean of its divisors is an integer number (1899018).

Almost surely, 2^18145226 is an apocalyptic number.

18145226 is a deficient number, since it is larger than the sum of its proper divisors (12239062).

18145226 is a wasteful number, since it uses less digits than its factorization.

18145226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19237.

The product of its digits is 3840, while the sum is 29.

The square root of 18145226 is about 4259.7213523891. The cubic root of 18145226 is about 262.7770667900. Note that the first 3 decimals are identical.

The spelling of 18145226 in words is "eighteen million, one hundred forty-five thousand, two hundred twenty-six".