18448667 has 2 divisors, whose sum is σ = 18448668. Its totient is φ = 18448666.

The previous prime is 18448663. The next prime is 18448673. The reversal of 18448667 is 76684481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18448667 - 2² = 18448663 is a prime.

It is not a weakly prime, because it can be changed into another prime (18448663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9224333 + 9224334.

It is an arithmetic number, because the mean of its divisors is an integer number (9224334).

Almost surely, 2^18448667 is an apocalyptic number.

18448667 is a deficient number, since it is larger than the sum of its proper divisors (1).

18448667 is an equidigital number, since it uses as much as digits as its factorization.

18448667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 44.

The square root of 18448667 is about 4295.1911482494. The cubic root of 18448667 is about 264.2337757478.

The spelling of 18448667 in words is "eighteen million, four hundred forty-eight thousand, six hundred sixty-seven".