18227648 has 14 divisors (see below), whose sum is σ = 36170616. Its totient is φ = 9113792.

The previous prime is 18227647. The next prime is 18227653. The reversal of 18227648 is 84672281.

It is a super-2 number, since 2×18227648² = 664494303223808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142340 + ... + 142467.

Almost surely, 2^18227648 is an apocalyptic number.

It is an amenable number.

18227648 is a deficient number, since it is larger than the sum of its proper divisors (17942968).

18227648 is an equidigital number, since it uses as much as digits as its factorization.

18227648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284819 (or 284809 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 18227648 is about 4269.3849674163. The cubic root of 18227648 is about 263.1743411700.

The spelling of 18227648 in words is "eighteen million, two hundred twenty-seven thousand, six hundred forty-eight".