18740867 has 2 divisors, whose sum is σ = 18740868. Its totient is φ = 18740866.

The previous prime is 18740863. The next prime is 18740881. The reversal of 18740867 is 76804781.

It is a weak prime.

It is an emirp because it is prime and its reverse (76804781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18740867 - 2² = 18740863 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18740861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9370433 + 9370434.

It is an arithmetic number, because the mean of its divisors is an integer number (9370434).

Almost surely, 2^18740867 is an apocalyptic number.

18740867 is a deficient number, since it is larger than the sum of its proper divisors (1).

18740867 is an equidigital number, since it uses as much as digits as its factorization.

18740867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 18740867 is about 4329.0723024685. The cubic root of 18740867 is about 265.6215007982.

The spelling of 18740867 in words is "eighteen million, seven hundred forty thousand, eight hundred sixty-seven".