18222707 has 2 divisors, whose sum is σ = 18222708. Its totient is φ = 18222706.

The previous prime is 18222703. The next prime is 18222731. The reversal of 18222707 is 70722281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18222707 - 2² = 18222703 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18222707.

It is not a weakly prime, because it can be changed into another prime (18222703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9111353 + 9111354.

It is an arithmetic number, because the mean of its divisors is an integer number (9111354).

Almost surely, 2^18222707 is an apocalyptic number.

18222707 is a deficient number, since it is larger than the sum of its proper divisors (1).

18222707 is an equidigital number, since it uses as much as digits as its factorization.

18222707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 18222707 is about 4268.8062734212. The cubic root of 18222707 is about 263.1505593134.

Adding to 18222707 its reverse (70722281), we get a palindrome (88944988).

The spelling of 18222707 in words is "eighteen million, two hundred twenty-two thousand, seven hundred seven".