18866109350 has 48 divisors (see below), whose sum is σ = 38820301056. Its totient is φ = 6763764000.

The previous prime is 18866109349. The next prime is 18866109359. The reversal of 18866109350 is 5390166881.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18866109295 and 18866109304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18866109359) 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 23 ways as a sum of consecutive naturals, for example, 202514 + ... + 280613.

It is an arithmetic number, because the mean of its divisors is an integer number (808756272).

Almost surely, 2^18866109350 is an apocalyptic number.

18866109350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18866109350 is an abundant number, since it is smaller than the sum of its proper divisors (19954191706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18866109350 is a wasteful number, since it uses less digits than its factorization.

18866109350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483221 (or 483216 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 18866109350 in words is "eighteen billion, eight hundred sixty-six million, one hundred nine thousand, three hundred fifty".