18481427 has 2 divisors, whose sum is σ = 18481428. Its totient is φ = 18481426.

The previous prime is 18481391. The next prime is 18481459. The reversal of 18481427 is 72418481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18481427 - 2¹⁸ = 18219283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18441427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9240713 + 9240714.

It is an arithmetic number, because the mean of its divisors is an integer number (9240714).

Almost surely, 2^18481427 is an apocalyptic number.

18481427 is a deficient number, since it is larger than the sum of its proper divisors (1).

18481427 is an equidigital number, since it uses as much as digits as its factorization.

18481427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14336, while the sum is 35.

The square root of 18481427 is about 4299.0030239580. The cubic root of 18481427 is about 264.3900865853.

The spelling of 18481427 in words is "eighteen million, four hundred eighty-one thousand, four hundred twenty-seven".