18471227 has 8 divisors (see below), whose sum is σ = 19016640. Its totient is φ = 17933760.

The previous prime is 18471199. The next prime is 18471241. The reversal of 18471227 is 72217481.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18471227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18471193 and 18471202.

It is not an unprimeable number, because it can be changed into a prime (18471247) 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, 2903 + ... + 6735.

It is an arithmetic number, because the mean of its divisors is an integer number (2377080).

Almost surely, 2^18471227 is an apocalyptic number.

18471227 is a deficient number, since it is larger than the sum of its proper divisors (545413).

18471227 is an equidigital number, since it uses as much as digits as its factorization.

18471227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973.

The product of its digits is 6272, while the sum is 32.

The square root of 18471227 is about 4297.8165386624. The cubic root of 18471227 is about 264.3414381926.

The spelling of 18471227 in words is "eighteen million, four hundred seventy-one thousand, two hundred twenty-seven".