18946427 has 2 divisors, whose sum is σ = 18946428. Its totient is φ = 18946426.

The previous prime is 18946397. The next prime is 18946451. The reversal of 18946427 is 72464981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18946427 - 2⁸ = 18946171 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18946127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9473213 + 9473214.

It is an arithmetic number, because the mean of its divisors is an integer number (9473214).

Almost surely, 2^18946427 is an apocalyptic number.

18946427 is a deficient number, since it is larger than the sum of its proper divisors (1).

18946427 is an equidigital number, since it uses as much as digits as its factorization.

18946427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 18946427 is about 4352.7493610361. The cubic root of 18946427 is about 266.5891317988.

The spelling of 18946427 in words is "eighteen million, nine hundred forty-six thousand, four hundred twenty-seven".