18181909100 has 18 divisors (see below), whose sum is σ = 39454742964. Its totient is φ = 7272763600.

The previous prime is 18181909099. The next prime is 18181909111. The reversal of 18181909100 is 190918181.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90909446 + ... + 90909645.

Almost surely, 2^18181909100 is an apocalyptic number.

18181909100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18181909100 is an abundant number, since it is smaller than the sum of its proper divisors (21272833864).

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

18181909100 is a wasteful number, since it uses less digits than its factorization.

18181909100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181819105 (or 181819098 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 38.

The spelling of 18181909100 in words is "eighteen billion, one hundred eighty-one million, nine hundred nine thousand, one hundred".