18394227 has 12 divisors (see below), whose sum is σ = 27724944. Its totient is φ = 11729520.

The previous prime is 18394213. The next prime is 18394231. The reversal of 18394227 is 72249381.

It is not a de Polignac number, because 18394227 - 2¹⁰ = 18393203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18394191 and 18394200.

It is not an unprimeable number, because it can be changed into a prime (18394297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44224 + ... + 44637.

It is an arithmetic number, because the mean of its divisors is an integer number (2310412).

Almost surely, 2^18394227 is an apocalyptic number.

18394227 is a deficient number, since it is larger than the sum of its proper divisors (9330717).

18394227 is a wasteful number, since it uses less digits than its factorization.

18394227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88890 (or 88887 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 18394227 is about 4288.8491463328. The cubic root of 18394227 is about 263.9736113431.

The spelling of 18394227 in words is "eighteen million, three hundred ninety-four thousand, two hundred twenty-seven".