18683640122 has 32 divisors (see below), whose sum is σ = 32702227200. Its totient is φ = 8002503600.

The previous prime is 18683640121. The next prime is 18683640193. The reversal of 18683640122 is 22104638681.

It is a self number, because there is not a number n which added to its sum of digits gives 18683640122.

It is not an unprimeable number, because it can be changed into a prime (18683640121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1296923 + ... + 1311249.

It is an arithmetic number, because the mean of its divisors is an integer number (1021944600).

Almost surely, 2^18683640122 is an apocalyptic number.

18683640122 is a deficient number, since it is larger than the sum of its proper divisors (14018587078).

18683640122 is a wasteful number, since it uses less digits than its factorization.

18683640122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16251 (or 16237 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 18683640122 in words is "eighteen billion, six hundred eighty-three million, six hundred forty thousand, one hundred twenty-two".