18730807 has 2 divisors, whose sum is σ = 18730808. Its totient is φ = 18730806.

The previous prime is 18730801. The next prime is 18730823. The reversal of 18730807 is 70803781.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (70803781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18730807 - 2³ = 18730799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18730801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9365403 + 9365404.

It is an arithmetic number, because the mean of its divisors is an integer number (9365404).

Almost surely, 2^18730807 is an apocalyptic number.

18730807 is a deficient number, since it is larger than the sum of its proper divisors (1).

18730807 is an equidigital number, since it uses as much as digits as its factorization.

18730807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 18730807 is about 4327.9102347438. The cubic root of 18730807 is about 265.5739642110.

The spelling of 18730807 in words is "eighteen million, seven hundred thirty thousand, eight hundred seven".