209018384802 has 96 divisors (see below), whose sum is σ = 497205596160. Its totient is φ = 63173882880.

The previous prime is 209018384801. The next prime is 209018384807. The reversal of 209018384802 is 208483810902.

209018384802 is a `hidden beast` number, since 2 + 0 + 90 + 1 + 83 + 8 + 480 + 2 = 666.

209018384802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (209018384801) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 2065974 + ... + 2164782.

It is an arithmetic number, because the mean of its divisors is an integer number (5179224960).

Almost surely, 2^209018384802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209018384802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248602798080).

209018384802 is an abundant number, since it is smaller than the sum of its proper divisors (288187211358).

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

209018384802 is a wasteful number, since it uses less digits than its factorization.

209018384802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99088 (or 99085 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 209018384802 in words is "two hundred nine billion, eighteen million, three hundred eighty-four thousand, eight hundred two".