209093819100 has 72 divisors (see below), whose sum is σ = 621328909488. Its totient is φ = 54251366400.

The previous prime is 209093819087. The next prime is 209093819141. The reversal of 209093819100 is 1918390902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9407541 + ... + 9429740.

Almost surely, 2^209093819100 is an apocalyptic number.

209093819100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209093819100 is an abundant number, since it is smaller than the sum of its proper divisors (412235090388).

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

209093819100 is a wasteful number, since it uses less digits than its factorization.

209093819100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18837335 (or 18837328 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 42.

The spelling of 209093819100 in words is "two hundred nine billion, ninety-three million, eight hundred nineteen thousand, one hundred".