18818707 has 2 divisors, whose sum is σ = 18818708. Its totient is φ = 18818706.

The previous prime is 18818693. The next prime is 18818719. The reversal of 18818707 is 70781881.

It is a strong prime.

It is an emirp because it is prime and its reverse (70781881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18818707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18818707.

It is not a weakly prime, because it can be changed into another prime (18818207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9409353 + 9409354.

It is an arithmetic number, because the mean of its divisors is an integer number (9409354).

Almost surely, 2^18818707 is an apocalyptic number.

18818707 is a deficient number, since it is larger than the sum of its proper divisors (1).

18818707 is an equidigital number, since it uses as much as digits as its factorization.

18818707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 40.

The square root of 18818707 is about 4338.0533652780. The cubic root of 18818707 is about 265.9887448834.

The spelling of 18818707 in words is "eighteen million, eight hundred eighteen thousand, seven hundred seven".