19818885100 has 36 divisors (see below), whose sum is σ = 49150836784. Its totient is φ = 6795046080.

The previous prime is 19818885083. The next prime is 19818885133. The reversal of 19818885100 is 158881891.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14155647 + ... + 14157046.

Almost surely, 2^19818885100 is an apocalyptic number.

19818885100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19818885100 is an abundant number, since it is smaller than the sum of its proper divisors (29331951684).

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

19818885100 is a wasteful number, since it uses less digits than its factorization.

19818885100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28312714 (or 28312707 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 49.

The spelling of 19818885100 in words is "nineteen billion, eight hundred eighteen million, eight hundred eighty-five thousand, one hundred".