209886994050 has 48 divisors (see below), whose sum is σ = 525673444032. Its totient is φ = 55415704000.

The previous prime is 209886994049. The next prime is 209886994067. The reversal of 209886994050 is 50499688902.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6911814 + ... + 6942113.

It is an arithmetic number, because the mean of its divisors is an integer number (10951530084).

Almost surely, 2^209886994050 is an apocalyptic number.

209886994050 is an abundant number, since it is smaller than the sum of its proper divisors (315786449982).

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

209886994050 is a wasteful number, since it uses less digits than its factorization.

209886994050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13854043 (or 13854038 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 209886994050 in words is "two hundred nine billion, eight hundred eighty-six million, nine hundred ninety-four thousand, fifty".