18421700108 has 12 divisors (see below), whose sum is σ = 36843400272. Its totient is φ = 7895014320.

The previous prime is 18421700093. The next prime is 18421700111. The reversal of 18421700108 is 80100712481.

18421700108 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328958903 + ... + 328958958.

It is an arithmetic number, because the mean of its divisors is an integer number (3070283356).

Almost surely, 2^18421700108 is an apocalyptic number.

It is an amenable number.

18421700108 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18421700108 is a wasteful number, since it uses less digits than its factorization.

18421700108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657917872 (or 657917870 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 32.

The spelling of 18421700108 in words is "eighteen billion, four hundred twenty-one million, seven hundred thousand, one hundred eight".