18722107 has 2 divisors, whose sum is σ = 18722108. Its totient is φ = 18722106.

The previous prime is 18722101. The next prime is 18722113. The reversal of 18722107 is 70122781.

It is a balanced prime because it is at equal distance from previous prime (18722101) and next prime (18722113).

It is a cyclic number.

It is not a de Polignac number, because 18722107 - 2⁷ = 18721979 is a prime.

It is not a weakly prime, because it can be changed into another prime (18722101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9361053 + 9361054.

It is an arithmetic number, because the mean of its divisors is an integer number (9361054).

Almost surely, 2^18722107 is an apocalyptic number.

18722107 is a deficient number, since it is larger than the sum of its proper divisors (1).

18722107 is an equidigital number, since it uses as much as digits as its factorization.

18722107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 18722107 is about 4326.9050139794. The cubic root of 18722107 is about 265.5328403146.

Adding to 18722107 its reverse (70122781), we get a palindrome (88844888).

The spelling of 18722107 in words is "eighteen million, seven hundred twenty-two thousand, one hundred seven".