18670667 has 2 divisors, whose sum is σ = 18670668. Its totient is φ = 18670666.

The previous prime is 18670661. The next prime is 18670669. The reversal of 18670667 is 76607681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18670667 - 2¹⁶ = 18605131 is a prime.

Together with 18670669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18670661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9335333 + 9335334.

It is an arithmetic number, because the mean of its divisors is an integer number (9335334).

Almost surely, 2^18670667 is an apocalyptic number.

18670667 is a deficient number, since it is larger than the sum of its proper divisors (1).

18670667 is an equidigital number, since it uses as much as digits as its factorization.

18670667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 18670667 is about 4320.9567227641. The cubic root of 18670667 is about 265.2894286434.

The spelling of 18670667 in words is "eighteen million, six hundred seventy thousand, six hundred sixty-seven".