18707122 has 12 divisors (see below), whose sum is σ = 32642190. Its totient is φ = 8017296.

The previous prime is 18707083. The next prime is 18707147. The reversal of 18707122 is 22170781.

It can be written as a sum of positive squares in only one way, i.e., 18653761 + 53361 = 4319^2 + 231^2 .

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 95347 + ... + 95542.

Almost surely, 2^18707122 is an apocalyptic number.

18707122 is a deficient number, since it is larger than the sum of its proper divisors (13935068).

18707122 is a wasteful number, since it uses less digits than its factorization.

18707122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190905 (or 190898 counting only the distinct ones).

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

The square root of 18707122 is about 4325.1730601214. The cubic root of 18707122 is about 265.4619780683.

The spelling of 18707122 in words is "eighteen million, seven hundred seven thousand, one hundred twenty-two".