18466667 has 2 divisors, whose sum is σ = 18466668. Its totient is φ = 18466666.

The previous prime is 18466633. The next prime is 18466673. The reversal of 18466667 is 76666481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18466667 - 2⁸ = 18466411 is a prime.

It is not a weakly prime, because it can be changed into another prime (18466067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9233333 + 9233334.

It is an arithmetic number, because the mean of its divisors is an integer number (9233334).

Almost surely, 2^18466667 is an apocalyptic number.

18466667 is a deficient number, since it is larger than the sum of its proper divisors (1).

18466667 is an equidigital number, since it uses as much as digits as its factorization.

18466667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 18466667 is about 4297.2860039797. The cubic root of 18466667 is about 264.3196837063.

The spelling of 18466667 in words is "eighteen million, four hundred sixty-six thousand, six hundred sixty-seven".