18866838708 has 48 divisors (see below), whose sum is σ = 48947424960. Its totient is φ = 6284652192.

The previous prime is 18866838707. The next prime is 18866838719. The reversal of 18866838708 is 80783866881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18866838707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101266 + ... + 219062.

It is an arithmetic number, because the mean of its divisors is an integer number (1019738020).

Almost surely, 2^18866838708 is an apocalyptic number.

18866838708 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18866838708 is an abundant number, since it is smaller than the sum of its proper divisors (30080586252).

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

18866838708 is a wasteful number, since it uses less digits than its factorization.

18866838708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119293 (or 119285 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 63.

The spelling of 18866838708 in words is "eighteen billion, eight hundred sixty-six million, eight hundred thirty-eight thousand, seven hundred eight".