18698227 has 2 divisors, whose sum is σ = 18698228. Its totient is φ = 18698226.

The previous prime is 18698203. The next prime is 18698233. The reversal of 18698227 is 72289681.

It is a strong prime.

It is an emirp because it is prime and its reverse (72289681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18698227 - 2¹¹ = 18696179 is a prime.

It is not a weakly prime, because it can be changed into another prime (18698237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9349113 + 9349114.

It is an arithmetic number, because the mean of its divisors is an integer number (9349114).

Almost surely, 2^18698227 is an apocalyptic number.

18698227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18698227 is an equidigital number, since it uses as much as digits as its factorization.

18698227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 18698227 is about 4324.1446553047. The cubic root of 18698227 is about 265.4198967931.

The spelling of 18698227 in words is "eighteen million, six hundred ninety-eight thousand, two hundred twenty-seven".